diff --git a/OSGKeyboard/Assets.xcassets/AppIcon.appiconset/Group 24.png b/OSGKeyboard/Assets.xcassets/AppIcon.appiconset/Group 24.png
index 0e6ff46..d80ad7f 100644
Binary files a/OSGKeyboard/Assets.xcassets/AppIcon.appiconset/Group 24.png and b/OSGKeyboard/Assets.xcassets/AppIcon.appiconset/Group 24.png differ
diff --git a/OSGKeyboard/Info.plist b/OSGKeyboard/Info.plist
index 227d0db..c0b8d78 100644
--- a/OSGKeyboard/Info.plist
+++ b/OSGKeyboard/Info.plist
@@ -3,7 +3,7 @@
 <plist version="1.0">
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
-	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<string>en</string>
 	<key>CFBundleDisplayName</key>
 	<string>OSGKeyboard</string>
 	<key>CFBundleExecutable</key>
@@ -12,6 +12,11 @@
 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
+	<key>CFBundleLocalizations</key>
+	<array>
+		<string>en</string>
+		<string>zh-Hans</string>
+	</array>
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
diff --git a/OSGKeyboard/Views/APISettingsCard.swift b/OSGKeyboard/Views/APISettingsCard.swift
index b4ff9b5..1f6b661 100644
--- a/OSGKeyboard/Views/APISettingsCard.swift
+++ b/OSGKeyboard/Views/APISettingsCard.swift
@@ -50,7 +50,7 @@ struct APISettingsCard: View {
                     HStack {
                         Image(systemName: "key.fill")
                             .foregroundStyle(palette.accent)
-                        Text("获取 API Key · Get an API key")
+                        Text("api.getKey")
                             .foregroundStyle(palette.textPrimary)
                         Spacer()
                         Image(systemName: "arrow.up.right.square")
@@ -77,7 +77,7 @@ struct APISettingsCard: View {
     private var keyField: some View {
         VStack(alignment: .leading, spacing: 6) {
             HStack {
-                Text("API Key · 密钥")
+                Text("api.key")
                     .font(TypeStyle.caption)
                     .foregroundStyle(palette.textSecondary)
                 Spacer()
@@ -143,7 +143,7 @@ struct APISettingsCard: View {
     private var testConnectionRow: some View {
         VStack(alignment: .leading, spacing: 6) {
             HStack {
-                Text("Connection · 连接测试")
+                Text("api.connection")
                     .font(TypeStyle.caption)
                     .foregroundStyle(palette.textSecondary)
                 Spacer()
@@ -176,10 +176,10 @@ struct APISettingsCard: View {
 
     private var testButtonLabel: String {
         switch testStatus {
-        case .idle:        return "测试连接 · Test"
-        case .running:     return "测试中… · Testing…"
-        case .success:     return "成功 · Retry"
-        case .failure:     return "失败 · Retry"
+        case .idle:        return NSLocalizedString("api.test.idle", comment: "")
+        case .running:     return NSLocalizedString("api.test.running", comment: "")
+        case .success:     return NSLocalizedString("api.test.success", comment: "")
+        case .failure:     return NSLocalizedString("api.test.failure", comment: "")
         }
     }
 
@@ -218,17 +218,30 @@ struct APISettingsCard: View {
         Task {
             do {
                 let reply = try await client.polish("ping", systemPrompt: "Reply with the single word PONG.")
-                testStatus = .success("连接成功 · Connected · “\(reply.prefix(60))”")
+                // Interpolated success message — LocalizedStringKey can't
+                // take %@, so we use `String.localizedStringWithFormat`
+                // with a key that has %@ in the value.
+                let preview = String(reply.prefix(60))
+                testStatus = .success(String.localizedStringWithFormat(
+                    NSLocalizedString("api.test.connectedWith", comment: "Connected test prefix"),
+                    preview
+                ))
             } catch LLMError.noAPIKey {
-                testStatus = .failure("未填写 API Key · API key missing")
+                testStatus = .failure(NSLocalizedString("api.test.missing", comment: ""))
             } catch let error as LLMError {
                 switch error {
                 case .http(let status):
-                    testStatus = .failure("HTTP \(status)")
+                    testStatus = .failure(String.localizedStringWithFormat(
+                        NSLocalizedString("api.test.http", comment: ""),
+                        status
+                    ))
                 case .rateLimited:
-                    testStatus = .failure("API 限流 (429) · Rate limited")
+                    testStatus = .failure(NSLocalizedString("api.test.rateLimited", comment: ""))
                 case .transport(let msg):
-                    testStatus = .failure("网络错误 · Network error: \(msg)")
+                    testStatus = .failure(String.localizedStringWithFormat(
+                        NSLocalizedString("api.test.transportWith", comment: ""),
+                        msg
+                    ))
                 default:
                     testStatus = .failure(error.errorDescription ?? "\(error)")
                 }
diff --git a/OSGKeyboard/Views/AppGroupErrorView.swift b/OSGKeyboard/Views/AppGroupErrorView.swift
index ce0b901..ece6b09 100644
--- a/OSGKeyboard/Views/AppGroupErrorView.swift
+++ b/OSGKeyboard/Views/AppGroupErrorView.swift
@@ -21,17 +21,17 @@ struct AppGroupErrorView: View {
             Image(systemName: "exclamationmark.triangle.fill")
                 .font(.system(size: 48))
                 .foregroundStyle(palette.danger)
-            Text("App Group 未配置 · App Group not configured")
+            Text("appGroup.error.title")
                 .font(TypeStyle.title2)
                 .multilineTextAlignment(.center)
-            Text("OSGKeyboard 需要 App Group 才能在键盘扩展和主 App 之间共享配置。\nOSGKeyboard needs an App Group to share config between the main app and the keyboard extension.")
+            Text("appGroup.error.body")
                 .font(TypeStyle.body)
                 .multilineTextAlignment(.center)
                 .foregroundStyle(palette.textSecondary)
             VStack(alignment: .leading, spacing: Spacing.sm) {
-                Label("在 Apple Developer 后台创建 group.com.osgkeyboard.shared · Create it in the Apple Developer portal", systemImage: "1.circle")
-                Label("主 App 和键盘扩展都启用该 App Group · Enable it for both the main app and the keyboard extension", systemImage: "2.circle")
-                Label("重新生成 provisioning profile 并下载 · Re-generate the provisioning profile and download it", systemImage: "3.circle")
+                Label("appGroup.error.step1", systemImage: "1.circle")
+                Label("appGroup.error.step2", systemImage: "2.circle")
+                Label("appGroup.error.step3", systemImage: "3.circle")
             }
             .font(TypeStyle.body)
             .foregroundStyle(palette.textPrimary)
diff --git a/OSGKeyboard/Views/EnginePickerSection.swift b/OSGKeyboard/Views/EnginePickerSection.swift
new file mode 100644
index 0000000..3f216de
--- /dev/null
+++ b/OSGKeyboard/Views/EnginePickerSection.swift
@@ -0,0 +1,111 @@
+// EnginePickerSection.swift
+// OSGKeyboard · Main App
+//
+// Engine picker — Local (on-device ASR, no LLM) vs Cloud (ASR + LLM
+// polish). Lives in its own file so the onboarding flow (first-run,
+// no API key yet) and the in-app Settings sheet can render the same
+// component: both need to expose the same two options, and the user
+// must reach the same "Cloud needs an API key" conclusion from either
+// entry point.
+//
+// Selecting "local" also forces `modeId = "transcribe"`: the Local
+// engine skips the LLM round-trip, so leaving modeId on `polish`
+// would surface a confusing "I set everything up and nothing
+// happens" state. The settings UI is the source of truth for
+// `engineMode`; the onboarding page mutates the same `ProviderConfig`
+// singleton.
+
+import SwiftUI
+import OSGKeyboardShared
+
+struct EnginePickerSection: View {
+    @Environment(\.themePalette) private var palette: ThemePalette
+
+    @ObservedObject var config: ProviderConfig
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: Spacing.xs) {
+            sectionHeader(
+                "settings.engine.title",
+                subtitle: "settings.engine.subtitle"
+            )
+            VStack(spacing: 0) {
+                engineOptionRow(
+                    id: "local",
+                    icon: "iphone.badge.checkmark",
+                    title: "本地识别 · On-device",
+                    subtitle: localSubtitle
+                )
+                Divider().background(palette.divider)
+                engineOptionRow(
+                    id: "cloud",
+                    icon: "wand.and.stars",
+                    title: "云端润色 · Cloud polish",
+                    subtitle: "ASR 转录 + LLM 润色,需要 API Key\nASR + LLM polish, API key required"
+                )
+            }
+            .background(palette.surface, in: RoundedRectangle(cornerRadius: Radius.large, style: .continuous))
+            .overlay(
+                RoundedRectangle(cornerRadius: Radius.large, style: .continuous)
+                    .stroke(palette.divider, lineWidth: 0.5)
+            )
+        }
+    }
+
+    private var localSubtitle: String {
+        if #available(iOS 26, *) {
+            return "SpeechAnalyzer · 始终端侧,无需联网\nAlways on-device, no network"
+        } else {
+            return "端侧 ASR · 仅转录,无润色\nOn-device ASR, transcription only, no polish"
+        }
+    }
+
+    private func engineOptionRow(id: String, icon: String, title: String, subtitle: String) -> some View {
+        let isSelected = config.engineMode == id
+        return Button {
+            withAnimation(.easeInOut(duration: 0.2)) {
+                config.engineMode = id
+                if id == "local" { config.modeId = "transcribe" }
+            }
+        } label: {
+            HStack(spacing: Spacing.sm) {
+                Image(systemName: icon)
+                    .font(.system(size: 18, weight: .medium))
+                    .foregroundStyle(isSelected ? palette.accent : palette.textSecondary)
+                    .frame(width: 28)
+                VStack(alignment: .leading, spacing: 2) {
+                    Text(title)
+                        .font(TypeStyle.body)
+                        .foregroundStyle(isSelected ? palette.accent : palette.textPrimary)
+                    Text(subtitle)
+                        .font(TypeStyle.caption2)
+                        .foregroundStyle(palette.textTertiary)
+                }
+                Spacer()
+                if isSelected {
+                    Image(systemName: "checkmark")
+                        .font(.system(size: 13, weight: .semibold))
+                        .foregroundStyle(palette.accent)
+                }
+            }
+            .padding(.horizontal, Spacing.md)
+            .padding(.vertical, Spacing.sm)
+            .contentShape(Rectangle())
+        }
+        .buttonStyle(.plain)
+    }
+
+    @ViewBuilder
+    private func sectionHeader(_ title: LocalizedStringKey, subtitle: LocalizedStringKey) -> some View {
+        VStack(alignment: .leading, spacing: 2) {
+            Text(title)
+                .font(TypeStyle.caption2)
+                .foregroundStyle(palette.textSecondary)
+                .textCase(.uppercase)
+            Text(subtitle)
+                .font(TypeStyle.caption2)
+                .foregroundStyle(palette.textTertiary)
+        }
+        .frame(maxWidth: .infinity, alignment: .leading)
+    }
+}
diff --git a/OSGKeyboard/Views/HomeView.swift b/OSGKeyboard/Views/HomeView.swift
index dd925fc..0e47ba7 100644
--- a/OSGKeyboard/Views/HomeView.swift
+++ b/OSGKeyboard/Views/HomeView.swift
@@ -91,14 +91,14 @@ struct HomeView: View {
                     Image(systemName: "waveform")
                         .font(.system(size: 36, weight: .light))
                         .foregroundStyle(palette.accent)
-                    Text("点此配置 · Tap to configure")
+                    Text("home.hero.label")
                         .font(TypeStyle.caption)
                         .foregroundStyle(palette.textSecondary)
                 }
             }
         }
         .buttonStyle(.plain)
-        .accessibilityLabel(Text("打开设置 · Open OSGKeyboard settings"))
+        .accessibilityLabel(Text("home.action.openSettingsA11y"))
     }
 
     // MARK: - Actions
@@ -110,7 +110,7 @@ struct HomeView: View {
                     UIApplication.shared.open(url)
                 }
             } label: {
-                Label("启用键盘 · Enable in iOS Settings", systemImage: "keyboard")
+                Label("home.action.enableInSettings", systemImage: "keyboard")
                     .primaryButton()
             }
             .buttonStyle(.plain)
@@ -118,7 +118,7 @@ struct HomeView: View {
             Button {
                 showSettings = true
             } label: {
-                Label("编辑 API 配置 · Edit API Configuration", systemImage: "slider.horizontal.3")
+                Label("home.action.editApi", systemImage: "slider.horizontal.3")
                     .secondaryButton()
             }
             .buttonStyle(.plain)
@@ -127,7 +127,7 @@ struct HomeView: View {
             Button {
                 showKeyboardPreview = true
             } label: {
-                Label("键盘预览 · Keyboard Preview (Debug)", systemImage: "eye")
+                Label("home.action.keyboardPreview", systemImage: "eye")
                     .secondaryButton()
             }
             .buttonStyle(.plain)
diff --git a/OSGKeyboard/Views/KeyboardPreviewSheet.swift b/OSGKeyboard/Views/KeyboardPreviewSheet.swift
index a174044..fec09ff 100644
--- a/OSGKeyboard/Views/KeyboardPreviewSheet.swift
+++ b/OSGKeyboard/Views/KeyboardPreviewSheet.swift
@@ -77,10 +77,10 @@ struct KeyboardPreviewSheet: View {
             palette.background.ignoresSafeArea()
             VStack(spacing: 0) {
                 VStack(spacing: Spacing.md) {
-                    Text("键盘预览 · Keyboard Preview")
+                    Text("preview.title")
                         .font(TypeStyle.title2)
                         .foregroundStyle(palette.textPrimary)
-                    Text("点按 disc 开始/结束录音;真实键盘使用同样布局。\nTap the disc to start/stop recording. The real keyboard uses the same layout.")
+                    Text("preview.subtitle")
                         .font(TypeStyle.caption)
                         .foregroundStyle(palette.textSecondary)
                         .multilineTextAlignment(.center)
@@ -110,7 +110,7 @@ struct KeyboardPreviewSheet: View {
         HStack(spacing: Spacing.xs) {
             Image(systemName: "text.cursor")
                 .foregroundStyle(palette.textSecondary)
-            TextField("试着输入或按 disc 录音 · Type or tap to record", text: $typedText, axis: .vertical)
+            TextField(LocalizedStringKey("preview.placeholder"), text: $typedText, axis: .vertical)
                 .lineLimit(1...4)
                 .textFieldStyle(.plain)
                 .foregroundStyle(palette.textPrimary)
@@ -123,7 +123,7 @@ struct KeyboardPreviewSheet: View {
                         .foregroundStyle(palette.textTertiary)
                 }
                 .buttonStyle(.plain)
-                .accessibilityLabel("清空 · Clear text")
+                .accessibilityLabel("preview.clear")
             }
         }
         .padding(Spacing.md)
diff --git a/OSGKeyboard/Views/KeyboardPreviewStub.swift b/OSGKeyboard/Views/KeyboardPreviewStub.swift
index f594cb7..dc97c11 100644
--- a/OSGKeyboard/Views/KeyboardPreviewStub.swift
+++ b/OSGKeyboard/Views/KeyboardPreviewStub.swift
@@ -61,7 +61,7 @@ struct KeyboardPreviewStub: View {
     private var modeChip: some View {
         HStack(spacing: 4) {
             Image(systemName: "wand.and.stars")
-            Text("润色 · Polish")
+            Text("mode.polish")
             Image(systemName: "chevron.down").font(.system(size: 8, weight: .bold))
         }
         .font(TypeStyle.caption2)
@@ -74,7 +74,7 @@ struct KeyboardPreviewStub: View {
     private var localeChip: some View {
         HStack(spacing: 4) {
             Image(systemName: "globe")
-            Text("简体 · ZH-Hans")
+            Text("locale.zh-Hans")
             Image(systemName: "chevron.down").font(.system(size: 8, weight: .bold))
         }
         .font(TypeStyle.caption2)
@@ -92,7 +92,7 @@ struct KeyboardPreviewStub: View {
             case .recording:
                 HStack(spacing: 4) {
                     Circle().fill(palette.recordRed).frame(width: 6, height: 6)
-                    Text("REC · 录音中").font(TypeStyle.caption2).foregroundStyle(palette.textSecondary)
+                    Text("keyboard.rec").font(TypeStyle.caption2).foregroundStyle(palette.textSecondary)
                 }
                 .padding(.horizontal, Spacing.xs).padding(.vertical, 3)
                 .background(palette.surface, in: Capsule())
@@ -123,7 +123,7 @@ struct KeyboardPreviewStub: View {
         Group {
             switch phase {
             case .idle:
-                Text("按住说话 · Hold to talk")
+                Text("keyboard.placeholder.idle")
                     .font(TypeStyle.caption)
                     .foregroundStyle(palette.textTertiary)
             case .recording:
@@ -136,7 +136,7 @@ struct KeyboardPreviewStub: View {
             case .processing:
                 HStack(spacing: 6) {
                     ProgressView().controlSize(.mini).tint(palette.accent)
-                    Text("处理中 · Processing")
+                    Text("keyboard.placeholder.processing")
                         .font(TypeStyle.caption)
                         .foregroundStyle(palette.textSecondary)
                 }
@@ -234,12 +234,12 @@ struct KeyboardPreviewStub: View {
     // MARK: - Bottom bar
 
     private var bottomBar: some View {
+        // Mirror the real keyboard — globe button removed (the iOS
+        // system keyboard strip already provides one).
         HStack(spacing: Spacing.xxs) {
-            iconButton("globe")
             iconButton("delete.left")
-            Spacer(minLength: 0)
             Button(action: {}) {
-                Text("空格 · Space")
+                Text("common.space")
                     .font(TypeStyle.body)
                     .foregroundStyle(palette.textPrimary)
                     .frame(maxWidth: .infinity, minHeight: 42)
@@ -247,7 +247,6 @@ struct KeyboardPreviewStub: View {
                     .overlay(RoundedRectangle(cornerRadius: Radius.medium, style: .continuous).stroke(palette.divider, lineWidth: 0.5))
             }
             .buttonStyle(.plain)
-            Spacer(minLength: 0)
             iconButton("return")
         }
         .padding(.horizontal, Spacing.sm)
diff --git a/OSGKeyboard/Views/OnboardingView.swift b/OSGKeyboard/Views/OnboardingView.swift
index 4571257..f3e3f18 100644
--- a/OSGKeyboard/Views/OnboardingView.swift
+++ b/OSGKeyboard/Views/OnboardingView.swift
@@ -1,12 +1,24 @@
 // OnboardingView.swift
 // OSGKeyboard · Main App
 //
-// Three-step onboarding presented as a horizontal pager:
+// Three-step onboarding:
 //
 //   1) Welcome — what the app does, in one sentence
 //   2) Enable  — Settings → General → Keyboards → Add → Allow Full Access
 //   3) Setup   — pick a provider, paste a key
 //
+// We deliberately do NOT use `TabView` with `.page` style for the
+// pager. That style wraps the content in a `UIPageViewController`,
+// and `UIPageViewController` has a long-standing iOS 18 bug where
+// the keyboard-showing layout reflow on a `TextField` focus is
+// misread as a horizontal swipe — the page jumps back to step 1
+// the moment the user starts typing. Replacing the TabView with a
+// `ZStack`-based conditional view sidesteps the bug entirely; we
+// give up the swipe-to-page gesture, but the Back/Next buttons at
+// the bottom (and the page dots) are the canonical onboarding
+// affordance and the user is never more than one tap from the next
+// page anyway.
+//
 // Visual style: one large accent surface, generous whitespace, single CTA
 // at the bottom. No tipsy animations, no cheerful illustrations — every
 // pixel is doing one job.
@@ -24,12 +36,15 @@ struct OnboardingView: View {
         ZStack {
             palette.background.ignoresSafeArea()
             VStack(spacing: 0) {
-                TabView(selection: $page) {
-                    WelcomePage().tag(0)
-                    EnableKeyboardPage().tag(1)
-                    APISetupPage(config: config).tag(2)
+                Group {
+                    switch page {
+                    case 0: WelcomePage()
+                    case 1: EnableKeyboardPage()
+                    default: APISetupPage(config: config)
+                    }
                 }
-                .tabViewStyle(.page(indexDisplayMode: .never))
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
+                .transition(.opacity.combined(with: .move(edge: .trailing)))
 
                 pageDots
                     .padding(.bottom, Spacing.md)
@@ -57,7 +72,7 @@ struct OnboardingView: View {
         HStack(spacing: Spacing.sm) {
             if page > 0 {
                 Button { withAnimation(Motion.soft) { page -= 1 } } label: {
-                    Text("返回 · Back")
+                    Text("common.back")
                         .font(TypeStyle.headline)
                         .frame(maxWidth: .infinity, minHeight: 50)
                         .background(palette.surface, in: RoundedRectangle(cornerRadius: Radius.large, style: .continuous))
@@ -75,7 +90,11 @@ struct OnboardingView: View {
                     if page < 2 { page += 1 }
                 }
             } label: {
-                Text(page == 2 ? (config.isConfigured ? "完成 · Done" : "继续 · Continue") : "下一步 · Next")
+                Text(page == 2
+                     ? (config.isConfigured
+                        ? NSLocalizedString("common.done", comment: "")
+                        : NSLocalizedString("common.continue", comment: ""))
+                     : NSLocalizedString("common.next", comment: ""))
                     .font(TypeStyle.headline)
                     .frame(maxWidth: .infinity, minHeight: 50)
                     .background(
@@ -113,11 +132,11 @@ private struct WelcomePage: View {
                 Text("OSGKeyboard")
                     .font(TypeStyle.title)
                     .foregroundStyle(palette.textPrimary)
-                Text("按住说话,松开即得润色文字。")
+                Text("onboarding.welcome.subtitle")
                     .font(TypeStyle.body)
                     .foregroundStyle(palette.textSecondary)
                     .multilineTextAlignment(.center)
-                Text("Hold to talk. Release for polished text, in any app.")
+                Text("onboarding.welcome.subtitle")
                     .font(TypeStyle.footnote)
                     .foregroundStyle(palette.textTertiary)
                     .multilineTextAlignment(.center)
@@ -136,14 +155,14 @@ private struct PrivacyFootnote: View {
     var body: some View {
         VStack(alignment: .leading, spacing: 8) {
             footnoteRow(icon: "lock.fill",
-                        title: "Audio stays on device · 音频不出本机",
-                        body: "Transcribed locally with Apple's speech engine. · 由 Apple 端侧引擎转录")
+                        title: "privacy.audio.title",
+                        body: "privacy.audio.body")
             footnoteRow(icon: "wifi",
-                        title: "Only the polished text is sent · 仅发送润色后文字",
-                        body: "Sent to your chosen LLM to add structure & punctuation. · 仅向所选 LLM 发送润色后文字")
+                        title: "privacy.network.title",
+                        body: "privacy.network.body")
             footnoteRow(icon: "keyboard",
-                        title: "Works everywhere · 处处可用",
-                        body: "WeChat, Notes, Mail, ChatGPT, Claude, Cursor — anywhere a keyboard appears. · 微信、备忘录、邮件、ChatGPT、Claude、Cursor — 任何键盘出现的地方")
+                        title: "privacy.universal.title",
+                        body: "privacy.universal.body")
         }
         .padding(Spacing.md)
         .background(palette.surface, in: RoundedRectangle(cornerRadius: Radius.large, style: .continuous))
@@ -154,7 +173,10 @@ private struct PrivacyFootnote: View {
         .padding(.horizontal, Spacing.md)
     }
 
-    private func footnoteRow(icon: String, title: String, body: String) -> some View {
+    // `LocalizedStringKey` (not `String`) so the call-site string
+    // literals are auto-looked-up in Localizable.strings. Passing a
+    // plain `String` would just print the key.
+    private func footnoteRow(icon: String, title: LocalizedStringKey, body: LocalizedStringKey) -> some View {
         HStack(alignment: .top, spacing: Spacing.xs) {
             Image(systemName: icon)
                 .font(.system(size: 14, weight: .medium))
@@ -185,10 +207,10 @@ private struct EnableKeyboardPage: View {
                 .font(.system(size: 64, weight: .light))
                 .foregroundStyle(palette.accent)
             VStack(spacing: Spacing.sm) {
-                Text("启用 OSGKeyboard")
+                Text("onboarding.enable.title")
                     .font(TypeStyle.title2)
                     .foregroundStyle(palette.textPrimary)
-                Text("Enable OSGKeyboard")
+                Text("onboarding.enable.title")
                     .font(TypeStyle.body)
                     .foregroundStyle(palette.textTertiary)
             }
@@ -240,25 +262,56 @@ private struct APISetupPage: View {
         ScrollView {
             VStack(alignment: .leading, spacing: Spacing.md) {
                 VStack(alignment: .leading, spacing: Spacing.xxs) {
-                    Text("配置 AI 提供商")
+                    Text("onboarding.api.title")
                         .font(TypeStyle.title2)
                         .foregroundStyle(palette.textPrimary)
-                    Text("Configure your AI provider")
-                        .font(TypeStyle.body)
-                        .foregroundStyle(palette.textTertiary)
-                    Text("OSGKeyboard only calls the AI to polish your text. No audio leaves your device.")
+                    Text("onboarding.api.subtitle")
                         .font(TypeStyle.footnote)
-                        .foregroundStyle(palette.textSecondary)
+                        .foregroundStyle(palette.textTertiary)
                         .padding(.top, Spacing.xxs)
                 }
                 .padding(.horizontal, Spacing.md)
                 .padding(.top, Spacing.lg)
 
-                ProviderPickerSection(config: config)
+                // Same Engine picker as Settings — see EnginePickerSection.
+                EnginePickerSection(config: config)
                     .padding(.horizontal, Spacing.md)
 
-                APISettingsCard(config: config)
+                if config.engineMode == "cloud" {
+                    ProviderPickerSection(config: config)
+                        .padding(.horizontal, Spacing.md)
+
+                    APISettingsCard(config: config)
+                        .padding(.horizontal, Spacing.md)
+                } else {
+                    // Local path: no LLM, no API key needed. Show a short
+                    // confirmation so the user understands "no further
+                    // setup required".
+                    VStack(alignment: .leading, spacing: Spacing.xs) {
+                        HStack(spacing: Spacing.sm) {
+                            Image(systemName: "checkmark.seal.fill")
+                                .font(.system(size: 18, weight: .medium))
+                                .foregroundStyle(palette.accent)
+                                .frame(width: 28)
+                            VStack(alignment: .leading, spacing: 2) {
+                                Text("onboarding.api.localReady.title")
+                                    .font(TypeStyle.body)
+                                    .foregroundStyle(palette.textPrimary)
+                                Text("onboarding.api.localReady.body")
+                                    .font(TypeStyle.caption2)
+                                    .foregroundStyle(palette.textTertiary)
+                            }
+                            Spacer()
+                        }
+                        .padding(Spacing.md)
+                    }
+                    .background(palette.surface, in: RoundedRectangle(cornerRadius: Radius.large, style: .continuous))
+                    .overlay(
+                        RoundedRectangle(cornerRadius: Radius.large, style: .continuous)
+                            .stroke(palette.divider, lineWidth: 0.5)
+                    )
                     .padding(.horizontal, Spacing.md)
+                }
             }
             .padding(.bottom, Spacing.xxxl)
         }
diff --git a/OSGKeyboard/Views/PreviewASRController.swift b/OSGKeyboard/Views/PreviewASRController.swift
index 9bc11f3..4a36c0a 100644
--- a/OSGKeyboard/Views/PreviewASRController.swift
+++ b/OSGKeyboard/Views/PreviewASRController.swift
@@ -78,7 +78,7 @@ final class PreviewASRController: ObservableObject {
         // hits `dispatch_assert_queue` in `_swift_task_checkIsolatedSwift`.
         let micGranted = await Self.requestMicrophonePermission()
         guard micGranted else {
-            phase = .denied("麦克风被拒绝 · Mic denied")
+            phase = .denied(NSLocalizedString("keyboard.denied.mic", comment: ""))
             return
         }
 
@@ -86,7 +86,7 @@ final class PreviewASRController: ObservableObject {
         // the callback fires on TCC's reply queue, NOT the main queue.
         let speechGranted = await Self.requestSpeechRecognitionPermission()
         guard speechGranted else {
-            phase = .denied("语音识别被拒绝 · Speech denied")
+            phase = .denied(NSLocalizedString("keyboard.denied.speech", comment: ""))
             return
         }
 
diff --git a/OSGKeyboard/Views/SettingsView.swift b/OSGKeyboard/Views/SettingsView.swift
index 825b9ce..4ba688e 100644
--- a/OSGKeyboard/Views/SettingsView.swift
+++ b/OSGKeyboard/Views/SettingsView.swift
@@ -39,108 +39,42 @@ struct SettingsView: View {
                     .padding(.vertical, Spacing.md)
                 }
             }
-            .navigationTitle("设置 · Settings")
+            .navigationTitle(LocalizedStringKey("settings.title"))
             .navigationBarTitleDisplayMode(.inline)
             .task { await loadDynamicLocales() }
             .toolbar {
                 ToolbarItem(placement: .confirmationAction) {
-                    Button("完成 · Done") { dismiss() }
+                    Button("common.done") { dismiss() }
                         .font(TypeStyle.headline)
                         .foregroundStyle(palette.accent)
                 }
             }
         }
         .confirmationDialog(
-            "重置所有设置? · Reset all settings?",
+            LocalizedStringKey("settings.reset.title"),
             isPresented: $showResetConfirm,
             titleVisibility: .visible
         ) {
-            Button("重置 · Reset", role: .destructive) {
+            Button(LocalizedStringKey("common.reset"), role: .destructive) {
                 config.reset()
             }
-            Button("取消 · Cancel", role: .cancel) {}
+            Button(LocalizedStringKey("common.cancel"), role: .cancel) {}
         } message: {
-            Text("API key、model 和 base URL 都会被清空。\nAPI key, model, and base URL will be cleared.")
+            Text("settings.reset.message")
         }
     }
 
     // MARK: - Engine
 
-    private var localEngineSubtitle: String {
-        if #available(iOS 26, *) {
-            return "SpeechAnalyzer · 始终端侧，无需联网 · Always on-device, no network"
-        } else {
-            return "端侧 ASR · 仅转录，无润色 · On-device ASR, transcription only, no polish"
-        }
-    }
-
     private var engineSection: some View {
-        VStack(alignment: .leading, spacing: Spacing.xs) {
-            sectionHeader("引擎 · Engine", subtitle: "选择识别方式。本地引擎无需 API Key，仅做语音转录。\nPick the recognition engine. Local engine does transcription only, no API key needed.")
-            VStack(spacing: 0) {
-                engineOptionRow(
-                    id: "local",
-                    icon: "iphone.badge.checkmark",
-                    title: "本地识别",
-                    subtitle: localEngineSubtitle
-                )
-                Divider().background(palette.divider)
-                engineOptionRow(
-                    id: "cloud",
-                    icon: "wand.and.stars",
-                    title: "云端润色",
-                    subtitle: "ASR 转录 + LLM 润色，需要 API Key · ASR + LLM polish, API key required"
-                )
-            }
-            .background(palette.surface, in: RoundedRectangle(cornerRadius: Radius.large, style: .continuous))
-            .overlay(
-                RoundedRectangle(cornerRadius: Radius.large, style: .continuous)
-                    .stroke(palette.divider, lineWidth: 0.5)
-            )
-        }
-    }
-
-    private func engineOptionRow(id: String, icon: String, title: String, subtitle: String) -> some View {
-        let isSelected = config.engineMode == id
-        return Button {
-            withAnimation(.easeInOut(duration: 0.2)) {
-                config.engineMode = id
-                // Lock mode to transcribe when switching to local engine
-                if id == "local" { config.modeId = "transcribe" }
-            }
-        } label: {
-            HStack(spacing: Spacing.sm) {
-                Image(systemName: icon)
-                    .font(.system(size: 18, weight: .medium))
-                    .foregroundStyle(isSelected ? palette.accent : palette.textSecondary)
-                    .frame(width: 28)
-                VStack(alignment: .leading, spacing: 2) {
-                    Text(title)
-                        .font(TypeStyle.body)
-                        .foregroundStyle(isSelected ? palette.accent : palette.textPrimary)
-                    Text(subtitle)
-                        .font(TypeStyle.caption2)
-                        .foregroundStyle(palette.textTertiary)
-                }
-                Spacer()
-                if isSelected {
-                    Image(systemName: "checkmark")
-                        .font(.system(size: 13, weight: .semibold))
-                        .foregroundStyle(palette.accent)
-                }
-            }
-            .padding(.horizontal, Spacing.md)
-            .padding(.vertical, Spacing.sm)
-            .contentShape(Rectangle())
-        }
-        .buttonStyle(.plain)
+        EnginePickerSection(config: config)
     }
 
     // MARK: - Provider
 
     private var providerSection: some View {
         VStack(alignment: .leading, spacing: Spacing.xs) {
-            sectionHeader("Provider · 提供商", subtitle: "选择 LLM 提供商。Pick the LLM that polishes your dictation.")
+            sectionHeader("settings.provider.title", subtitle: "settings.provider.subtitle")
             ProviderPickerSection(config: config)
         }
     }
@@ -193,14 +127,14 @@ struct SettingsView: View {
                     Image(systemName: "iphone")
                         .font(TypeStyle.caption2)
                         .foregroundStyle(palette.success)
-                    Text("端侧识别 · On-device")
+                    Text("settings.legend.onDevice")
                         .font(TypeStyle.caption2)
                         .foregroundStyle(palette.textTertiary)
                     Spacer()
                     Image(systemName: "cloud")
                         .font(TypeStyle.caption2)
                         .foregroundStyle(palette.warning)
-                    Text("需联网 · Cloud fallback")
+                    Text("settings.legend.cloudFallback")
                         .font(TypeStyle.caption2)
                         .foregroundStyle(palette.textTertiary)
                 }
@@ -216,7 +150,7 @@ struct SettingsView: View {
     private var asrEngineRow: some View {
         if #available(iOS 26, *) {
             HStack(spacing: Spacing.sm) {
-                Text("识别引擎 · Engine")
+                Text("settings.engineRow.title")
                     .font(TypeStyle.body)
                     .foregroundStyle(palette.textPrimary)
                 Spacer()
@@ -224,7 +158,7 @@ struct SettingsView: View {
                     Image(systemName: "iphone.badge.checkmark")
                         .font(.system(size: 12, weight: .semibold))
                         .foregroundStyle(palette.success)
-                    Text("SpeechAnalyzer · 始终端侧")
+                    Text("settings.engineBadge.ios26")
                         .font(TypeStyle.caption)
                         .foregroundStyle(palette.success)
                 }
@@ -240,7 +174,7 @@ struct SettingsView: View {
                 set: { config.requiresOnDevice = $0 }
             )) {
                 VStack(alignment: .leading, spacing: 2) {
-                    Text("仅端侧识别 · On-device only")
+                    Text("settings.onDeviceOnly.title")
                         .font(TypeStyle.body)
                         .foregroundStyle(palette.textPrimary)
                     Text("禁用云端回退，识别失败时会报错而非联网 · Disable cloud fallback, fail locally instead of going online")
@@ -261,20 +195,20 @@ struct SettingsView: View {
 
     private var staticLocales: [(id: String, label: String, onDevice: Bool)] {
         [
-            ("auto",     "Auto · 跟随系统", false),
-            ("zh-Hans",  "中文(简体)",      false),
-            ("zh-Hant",  "中文(繁體)",      false),
-            ("en-US",    "English (US)",    false),
-            ("ja-JP",    "日本語",          false),
-            ("ko-KR",    "한국어",          false)
+            ("auto",     NSLocalizedString("locale.auto", comment: ""),     false),
+            ("zh-Hans",  NSLocalizedString("locale.zh-Hans", comment: ""),  false),
+            ("zh-Hant",  NSLocalizedString("locale.zh-Hant", comment: ""),  false),
+            ("en-US",    NSLocalizedString("locale.en-US", comment: ""),    false),
+            ("ja-JP",    NSLocalizedString("locale.ja-JP", comment: ""),    false),
+            ("ko-KR",    NSLocalizedString("locale.ko-KR", comment: ""),    false)
         ]
     }
 
     private var modeOptions: [(id: String, label: String)] {
         [
-            ("off",        "Off · 关闭"),
-            ("transcribe", "Transcribe · 仅转写"),
-            ("polish",     "Polish · 润色")
+            ("off",        NSLocalizedString("settings.mode.off", comment: "")),
+            ("transcribe", NSLocalizedString("settings.mode.transcribe", comment: "")),
+            ("polish",     NSLocalizedString("settings.mode.polish", comment: ""))
         ]
     }
 
@@ -314,7 +248,7 @@ struct SettingsView: View {
             HStack {
                 sectionHeader("System Prompt · 系统提示", subtitle: nil)
                 Spacer()
-                Button("重置 · Reset") { config.systemPrompt = config.defaultSystemPrompt }
+                Button("common.reset") { config.systemPrompt = config.defaultSystemPrompt }
                     .font(TypeStyle.caption2)
                     .foregroundStyle(palette.accent)
             }
@@ -340,7 +274,7 @@ struct SettingsView: View {
         Button(role: .destructive) {
             showResetConfirm = true
         } label: {
-            Text("重置所有设置 · Reset all settings")
+            Text("settings.reset.confirm")
                 .font(TypeStyle.caption)
                 .foregroundStyle(palette.danger)
                 .frame(maxWidth: .infinity, minHeight: 40)
@@ -350,7 +284,7 @@ struct SettingsView: View {
 
     // MARK: - Header
 
-    private func sectionHeader(_ title: String, subtitle: String?) -> some View {
+    private func sectionHeader(_ title: LocalizedStringKey, subtitle: LocalizedStringKey?) -> some View {
         VStack(alignment: .leading, spacing: 2) {
             Text(title)
                 .font(TypeStyle.caption2)
@@ -423,7 +357,7 @@ private struct LocalePickerRow: View {
 
     var body: some View {
         HStack {
-            Text("ASR locale · 识别语言")
+            Text("settings.asrLocale")
                 .font(TypeStyle.body)
                 .foregroundStyle(palette.textPrimary)
             Spacer()
diff --git a/OSGKeyboard/en.lproj/Localizable.strings b/OSGKeyboard/en.lproj/Localizable.strings
new file mode 100644
index 0000000..da5b5e9
--- /dev/null
+++ b/OSGKeyboard/en.lproj/Localizable.strings
@@ -0,0 +1,141 @@
+/* OSGKeyboard · English localization (development language) */
+
+"OSGKeyboard" = "OSGKeyboard";
+
+/* Onboarding */
+"onboarding.welcome.subtitle" = "Hold to talk. Release for polished text, in any app.";
+"onboarding.enable.title" = "Enable OSGKeyboard";
+"onboarding.enable.step1" = "Settings → General → Keyboard → Keyboards";
+"onboarding.enable.step2" = "Tap “Add New Keyboard…” and choose OSGKeyboard";
+"onboarding.enable.step3" = "Tap OSGKeyboard and enable “Allow Full Access”";
+"onboarding.enable.step4" = "Allow Full Access is required for the microphone and LLM calls.";
+"onboarding.enable.openSettings" = "Open iOS Settings";
+"onboarding.api.title" = "Choose engine";
+"onboarding.api.subtitle" = "Local needs no API key; Cloud polishes your text via LLM.";
+"onboarding.api.localReady.title" = "No API key needed";
+"onboarding.api.localReady.body" = "Local recognition is ready to use. Tap Done to start.";
+
+/* Common navigation */
+"common.back" = "Back";
+"common.next" = "Next";
+"common.done" = "Done";
+"common.continue" = "Continue";
+"common.reset" = "Reset";
+"common.cancel" = "Cancel";
+"common.delete" = "Delete";
+"common.space" = "Space";
+"common.newline" = "Return";
+
+/* Privacy footnote (onboarding welcome page) */
+"privacy.audio.title" = "Audio stays on device";
+"privacy.audio.body" = "Transcribed locally with Apple’s speech engine.";
+"privacy.network.title" = "Only the polished text is sent";
+"privacy.network.body" = "Sent to your chosen LLM to add structure & punctuation.";
+"privacy.universal.title" = "Works everywhere";
+"privacy.universal.body" = "WeChat, Notes, Mail, ChatGPT, Claude, Cursor — anywhere a keyboard appears.";
+
+/* Home */
+"home.status.ready" = "Ready";
+"home.status.setupIncomplete" = "Setup incomplete";
+"home.hero.label" = "Tap to configure";
+"home.action.enableInSettings" = "Enable in iOS Settings";
+"home.action.editApi" = "Edit API Configuration";
+"home.action.keyboardPreview" = "Keyboard Preview (Debug)";
+"home.action.openSettingsA11y" = "Open OSGKeyboard settings";
+
+/* API settings */
+"api.baseUrl" = "Base URL";
+"api.model" = "Model";
+"api.getKey" = "Get an API key";
+"api.key" = "API Key";
+"api.key.placeholder" = "sk-…";
+"api.key.show" = "Show";
+"api.key.hide" = "Hide";
+"api.connection" = "Connection";
+"api.test.idle" = "Test connection";
+"api.test.running" = "Testing…";
+"api.test.success" = "Success · Retry";
+"api.test.failure" = "Failed · Retry";
+"api.test.connected" = "Connected";
+"api.test.missing" = "API key missing";
+"api.test.rateLimited" = "Rate limited (429)";
+"api.test.http" = "HTTP %d";
+"api.test.network" = "Network error";
+"api.test.connectedWith" = "“%@”";
+"api.test.transportWith" = "%@";
+
+/* Settings */
+"settings.title" = "Settings";
+"settings.reset.title" = "Reset all settings?";
+"settings.reset.message" = "API key, model, and base URL will be cleared.";
+"settings.reset.confirm" = "Reset all settings";
+"settings.engine.title" = "Engine";
+"settings.engine.subtitle" = "Pick the recognition engine. Local engine does transcription only, no API key needed.";
+"settings.engine.local.title" = "On-device";
+"settings.engine.local.ios26" = "Always on-device, no network.";
+"settings.engine.local.legacy" = "On-device ASR. Transcription only, no polish.";
+"settings.engine.cloud.title" = "Cloud polish";
+"settings.engine.cloud.subtitle" = "ASR + LLM polish. API key required.";
+"settings.provider.title" = "Provider";
+"settings.provider.subtitle" = "Pick the LLM that polishes your dictation.";
+"settings.api.title" = "API";
+"settings.language.title" = "Language";
+"settings.language.subtitle.cloud" = "Recognition language and text processing mode.";
+"settings.language.subtitle.local" = "Recognition language.";
+"settings.mode.title" = "Mode";
+"settings.mode.off" = "Off";
+"settings.mode.transcribe" = "Transcribe";
+"settings.mode.polish" = "Polish";
+"settings.systemPrompt.title" = "System Prompt";
+"settings.systemPrompt.reset" = "Reset";
+"settings.asrLocale" = "ASR locale";
+"settings.engineBadge.ios26" = "SpeechAnalyzer — always on-device";
+"settings.engineRow.title" = "Recognition engine";
+"settings.onDeviceOnly.title" = "On-device only";
+"settings.onDeviceOnly.body" = "Disable cloud fallback. The keyboard reports an error instead of going online.";
+"settings.legend.onDevice" = "On-device";
+"settings.legend.cloudFallback" = "Cloud fallback";
+
+/* App group error */
+"appGroup.error.title" = "App Group not configured";
+"appGroup.error.body" = "OSGKeyboard needs an App Group to share config between the main app and the keyboard extension.";
+"appGroup.error.step1" = "Create group.com.osgkeyboard.shared in the Apple Developer portal";
+"appGroup.error.step2" = "Enable it for both the main app and the keyboard extension";
+"appGroup.error.step3" = "Re-generate the provisioning profile and download it";
+
+/* Keyboard preview */
+"preview.title" = "Keyboard Preview";
+"preview.subtitle" = "Tap the disc to start/stop recording. The real keyboard uses the same layout.";
+"preview.placeholder" = "Type or tap to record";
+"preview.clear" = "Clear text";
+"preview.openSettingsA11y" = "Open OSGKeyboard settings";
+
+/* Keyboard (ext) */
+"keyboard.placeholder.idle" = "Hold to talk";
+"keyboard.placeholder.preparing" = "Preparing";
+"keyboard.placeholder.processing" = "Processing";
+"keyboard.placeholder.error" = "Polishing failed";
+"keyboard.placeholder.localBadge" = "On-device";
+"keyboard.rec" = "REC";
+"keyboard.space" = "Space";
+"keyboard.denied.mic" = "Mic denied";
+"keyboard.denied.speech" = "Speech denied";
+"keyboard.openSettingsA11y" = "Open OSGKeyboard settings";
+"keyboard.deniedHint" = "Opens the OSGKeyboard settings page where you can grant microphone or speech recognition access.";
+"keyboard.pressToTalkA11y" = "Push to talk";
+
+/* Mode chip labels (used in both ext + preview stub) */
+"mode.off" = "Off";
+"mode.transcribe" = "Transcribe";
+"mode.polish" = "Polish";
+
+/* Locale chip labels (preview stub) */
+"locale.zh-Hans" = "ZH-Hans";
+
+/* Locale menu items (settings) */
+"locale.auto"     = "Auto";
+"locale.zh-Hans"  = "Chinese (Simplified)";
+"locale.zh-Hant"  = "Chinese (Traditional)";
+"locale.en-US"    = "English (US)";
+"locale.ja-JP"    = "Japanese";
+"locale.ko-KR"    = "Korean";
diff --git a/OSGKeyboard/zh-Hans.lproj/Localizable.strings b/OSGKeyboard/zh-Hans.lproj/Localizable.strings
new file mode 100644
index 0000000..b1e291d
--- /dev/null
+++ b/OSGKeyboard/zh-Hans.lproj/Localizable.strings
@@ -0,0 +1,141 @@
+/* OSGKeyboard · 简体中文翻译 */
+
+"OSGKeyboard" = "OSGKeyboard";
+
+/* Onboarding */
+"onboarding.welcome.subtitle" = "按住说话,松开即得润色文字。";
+"onboarding.enable.title" = "启用 OSGKeyboard";
+"onboarding.enable.step1" = "设置 → 通用 → 键盘 → 键盘";
+"onboarding.enable.step2" = "点击「添加新键盘…」并选择 OSGKeyboard";
+"onboarding.enable.step3" = "点击 OSGKeyboard 并启用「允许完全访问」";
+"onboarding.enable.step4" = "允许完全访问是麦克风和网络调用的前提。";
+"onboarding.enable.openSettings" = "打开 iOS 设置";
+"onboarding.api.title" = "选择引擎";
+"onboarding.api.subtitle" = "Local 不需要 API Key;Cloud 用 LLM 润色文字。";
+"onboarding.api.localReady.title" = "无需配置 API Key";
+"onboarding.api.localReady.body" = "本地识别直接可用,按 Done 即可开始使用。";
+
+/* Common navigation */
+"common.back" = "返回";
+"common.next" = "下一步";
+"common.done" = "完成";
+"common.continue" = "继续";
+"common.reset" = "重置";
+"common.cancel" = "取消";
+"common.delete" = "删除";
+"common.space" = "空格";
+"common.newline" = "换行";
+
+/* Privacy footnote (onboarding welcome page) */
+"privacy.audio.title" = "音频不出本机";
+"privacy.audio.body" = "由 Apple 端侧引擎转录。";
+"privacy.network.title" = "仅发送润色后文字";
+"privacy.network.body" = "仅向所选 LLM 发送润色后文字,用于整理结构和标点。";
+"privacy.universal.title" = "处处可用";
+"privacy.universal.body" = "微信、备忘录、邮件、ChatGPT、Claude、Cursor — 任何键盘出现的地方。";
+
+/* Home */
+"home.status.ready" = "就绪";
+"home.status.setupIncomplete" = "未完成配置";
+"home.hero.label" = "点此配置";
+"home.action.enableInSettings" = "在 iOS 设置中启用";
+"home.action.editApi" = "编辑 API 配置";
+"home.action.keyboardPreview" = "键盘预览(Debug)";
+"home.action.openSettingsA11y" = "打开 OSGKeyboard 设置";
+
+/* API settings */
+"api.baseUrl" = "接口地址";
+"api.model" = "模型";
+"api.getKey" = "获取 API Key";
+"api.key" = "API Key";
+"api.key.placeholder" = "sk-…";
+"api.key.show" = "显示";
+"api.key.hide" = "隐藏";
+"api.connection" = "连接测试";
+"api.test.idle" = "测试连接";
+"api.test.running" = "测试中…";
+"api.test.success" = "成功 · 重试";
+"api.test.failure" = "失败 · 重试";
+"api.test.connected" = "连接成功";
+"api.test.missing" = "未填写 API Key";
+"api.test.rateLimited" = "API 限流 (429)";
+"api.test.http" = "HTTP %d";
+"api.test.network" = "网络错误";
+"api.test.connectedWith" = "“%@”";
+"api.test.transportWith" = "%@";
+
+/* Settings */
+"settings.title" = "设置";
+"settings.reset.title" = "重置所有设置?";
+"settings.reset.message" = "API key、model 和 base URL 都会被清空。";
+"settings.reset.confirm" = "重置所有设置";
+"settings.engine.title" = "引擎";
+"settings.engine.subtitle" = "选择识别方式。本地引擎无需 API Key,仅做语音转录。";
+"settings.engine.local.title" = "本地识别";
+"settings.engine.local.ios26" = "始终端侧,无需联网。";
+"settings.engine.local.legacy" = "端侧 ASR,仅转录,无润色。";
+"settings.engine.cloud.title" = "云端润色";
+"settings.engine.cloud.subtitle" = "ASR 转录 + LLM 润色,需要 API Key。";
+"settings.provider.title" = "提供商";
+"settings.provider.subtitle" = "选择 LLM 提供商。";
+"settings.api.title" = "接口";
+"settings.language.title" = "语言";
+"settings.language.subtitle.cloud" = "选择识别语言和文字处理模式。";
+"settings.language.subtitle.local" = "选择识别语言。";
+"settings.mode.title" = "模式";
+"settings.mode.off" = "关闭";
+"settings.mode.transcribe" = "转写";
+"settings.mode.polish" = "润色";
+"settings.systemPrompt.title" = "系统提示";
+"settings.systemPrompt.reset" = "重置";
+"settings.asrLocale" = "识别语言";
+"settings.engineBadge.ios26" = "SpeechAnalyzer — 始终端侧";
+"settings.engineRow.title" = "识别引擎";
+"settings.onDeviceOnly.title" = "仅端侧识别";
+"settings.onDeviceOnly.body" = "禁用云端回退,识别失败时会报错而非联网。";
+"settings.legend.onDevice" = "端侧识别";
+"settings.legend.cloudFallback" = "需联网";
+
+/* App group error */
+"appGroup.error.title" = "App Group 未配置";
+"appGroup.error.body" = "OSGKeyboard 需要 App Group 才能在键盘扩展和主 App 之间共享配置。";
+"appGroup.error.step1" = "在 Apple Developer 后台创建 group.com.osgkeyboard.shared";
+"appGroup.error.step2" = "主 App 和键盘扩展都启用该 App Group";
+"appGroup.error.step3" = "重新生成 provisioning profile 并下载";
+
+/* Keyboard preview */
+"preview.title" = "键盘预览";
+"preview.subtitle" = "点按 disc 开始/结束录音;真实键盘使用同样布局。";
+"preview.placeholder" = "试着输入或按 disc 录音";
+"preview.clear" = "清空";
+"preview.openSettingsA11y" = "打开 OSGKeyboard 设置";
+
+/* Keyboard (ext) */
+"keyboard.placeholder.idle" = "按住说话";
+"keyboard.placeholder.preparing" = "准备中…";
+"keyboard.placeholder.processing" = "处理中…";
+"keyboard.placeholder.error" = "润色失败";
+"keyboard.placeholder.localBadge" = "本地";
+"keyboard.rec" = "REC";
+"keyboard.space" = "空格";
+"keyboard.denied.mic" = "麦克风被拒绝";
+"keyboard.denied.speech" = "语音识别被拒绝";
+"keyboard.openSettingsA11y" = "打开 OSGKeyboard 设置";
+"keyboard.deniedHint" = "打开 OSGKeyboard 设置,可授予麦克风 / 语音识别权限。";
+"keyboard.pressToTalkA11y" = "按住说话";
+
+/* Mode chip labels */
+"mode.off" = "关闭";
+"mode.transcribe" = "转写";
+"mode.polish" = "润色";
+
+/* Locale chip labels (preview stub) */
+"locale.zh-Hans" = "简体";
+
+/* Locale menu items (settings) */
+"locale.auto"     = "跟随系统";
+"locale.zh-Hans"  = "中文(简体)";
+"locale.zh-Hant"  = "中文(繁體)";
+"locale.en-US"    = "English (US)";
+"locale.ja-JP"    = "日本語";
+"locale.ko-KR"    = "한국어";
diff --git a/OSGKeyboardExt/KeyboardViewController.swift b/OSGKeyboardExt/KeyboardViewController.swift
index 8a5e88a..104ec35 100644
--- a/OSGKeyboardExt/KeyboardViewController.swift
+++ b/OSGKeyboardExt/KeyboardViewController.swift
@@ -80,15 +80,17 @@ public final class KeyboardViewController: UIInputViewController {
     // MARK: - Wiring
 
     private func installStateActions() {
-        state.beginRecording  = { [weak self] in self?.pressBegan() }
-        state.endRecording    = { [weak self] in self?.pressEnded() }
-        state.tapMic          = { [weak self] in self?.advanceToNextInputMode() }
-        state.openSettings    = { [weak self] in self?.openHostApp() }
-        state.setMode         = { [weak self] m in self?.persistMode(m) }
-        state.setLocale       = { [weak self] l in self?.persistLocale(l) }
-        state.insertNewline   = { [weak self] in self?.textDocumentProxy.insertText("\n") }
-        state.insertSpace     = { [weak self] in self?.textDocumentProxy.insertText(" ") }
-        state.deleteBackward  = { [weak self] in self?.textDocumentProxy.deleteBackward() }
+        state.beginRecording      = { [weak self] in self?.pressBegan() }
+        state.endRecording        = { [weak self] in self?.pressEnded() }
+        state.tapMic              = { [weak self] in self?.advanceToNextInputMode() }
+        state.openSettings        = { [weak self] in self?.openHostApp() }
+        state.setMode             = { [weak self] m in self?.persistMode(m) }
+        state.setLocale           = { [weak self] l in self?.persistLocale(l) }
+        state.setRequiresOnDevice = { [weak self] v in self?.persistRequiresOnDevice(v) }
+        state.setEngineMode       = { [weak self] m in self?.persistEngineMode(m) }
+        state.insertNewline       = { [weak self] in self?.textDocumentProxy.insertText("\n") }
+        state.insertSpace         = { [weak self] in self?.textDocumentProxy.insertText(" ") }
+        state.deleteBackward      = { [weak self] in self?.textDocumentProxy.deleteBackward() }
     }
 
     private func installSwiftUI() {
@@ -181,7 +183,11 @@ public final class KeyboardViewController: UIInputViewController {
         state.lastTranscript = ""
 
         let locale = resolveLocale(state.localeId)
-        let events = asr.transcribe(stream: session.audio, locale: locale)
+        let events = asr.transcribe(
+            stream: session.audio,
+            locale: locale,
+            requiresOnDevice: state.requiresOnDevice
+        )
 
         asrTask = Task { @MainActor [weak self] in
             guard let self else { return }
@@ -237,8 +243,8 @@ public final class KeyboardViewController: UIInputViewController {
             state.phase = .idle
             return
         }
-        // In `.transcribe` mode, skip the LLM and insert raw.
-        if state.mode == .transcribe {
+        // Local engine or transcribe mode: insert directly, no LLM call.
+        if state.isLocalEngine || state.mode == .transcribe {
             textDocumentProxy.insertText(trimmed)
             state.lastTranscript = ""
             state.phase = .idle
@@ -328,6 +334,16 @@ public final class KeyboardViewController: UIInputViewController {
         persistor.persist(localeId: id)
     }
 
+    private func persistRequiresOnDevice(_ value: Bool) {
+        state.requiresOnDevice = value
+        persistor.persist(requiresOnDevice: value)
+    }
+
+    private func persistEngineMode(_ mode: String) {
+        state.engineMode = mode
+        persistor.persist(engineMode: mode)
+    }
+
     // MARK: - Open host app
 
     private func openHostApp() {
diff --git a/OSGKeyboardExt/Services/AppGroupPersistor.swift b/OSGKeyboardExt/Services/AppGroupPersistor.swift
index 3d6b34f..0424bfa 100644
--- a/OSGKeyboardExt/Services/AppGroupPersistor.swift
+++ b/OSGKeyboardExt/Services/AppGroupPersistor.swift
@@ -30,8 +30,10 @@ public struct AppGroupPersistor {
             return .unavailable
         }
         let store = AppGroupStore()
-        state.localeId = store.localeId
-        state.mode = KeyboardViewController.State.InputMode(rawValue: store.modeId) ?? .polish
+        state.localeId         = store.localeId
+        state.mode             = KeyboardViewController.State.InputMode(rawValue: store.modeId) ?? .polish
+        state.requiresOnDevice = store.requiresOnDevice
+        state.engineMode       = store.engineMode
 
         #if DEBUG
         // Print a masked view of the live App Group config so we can see
@@ -68,4 +70,14 @@ public struct AppGroupPersistor {
     public func persist(localeId: String) {
         AppGroupStore().setLocaleId(localeId)
     }
+
+    /// Persist the `requiresOnDevice` flag to the App Group store.
+    public func persist(requiresOnDevice: Bool) {
+        AppGroupStore().setRequiresOnDevice(requiresOnDevice)
+    }
+
+    /// Persist `engineMode` to the App Group store.
+    public func persist(engineMode: String) {
+        AppGroupStore().setEngineMode(engineMode)
+    }
 }
\ No newline at end of file
diff --git a/OSGKeyboardExt/Views/KeyboardRootView.swift b/OSGKeyboardExt/Views/KeyboardRootView.swift
index dffb6a2..fdb5e21 100644
--- a/OSGKeyboardExt/Views/KeyboardRootView.swift
+++ b/OSGKeyboardExt/Views/KeyboardRootView.swift
@@ -96,7 +96,7 @@ public struct KeyboardRootView: View {
                     .overlay(Circle().stroke(palette.divider, lineWidth: 0.5))
             }
             .buttonStyle(.plain)
-            .accessibilityLabel(Text("打开设置 · Open OSGKeyboard settings"))
+            .accessibilityLabel(Text("home.action.openSettingsA11y"))
         }
         .padding(.horizontal, Spacing.md)
     }
@@ -128,16 +128,18 @@ public struct KeyboardRootView: View {
     // MARK: - Bottom bar
 
     private var bottomBar: some View {
+        // The globe / "next keyboard" button used to live here so the
+        // user could long-press to call up the system keyboard picker.
+        // In practice the user already has a "globe" key in the iOS
+        // system keyboard strip (every iOS keyboard does), so an
+        // in-extension globe is redundant and crowds the bar.
+        // Bottom bar: ⌫ (delete)  [    space    ]  ↩ (return)
         HStack(spacing: Spacing.xxs) {
-            ToolbarIconButton(systemName: "globe", label: "nextKeyboard") {
-                state.tapMic()
-            }
             ToolbarIconButton(systemName: "delete.left", label: "delete") {
                 state.deleteBackward()
             }
-            Spacer(minLength: 0)
             Button(action: state.insertSpace) {
-                Text("空格 · Space")
+                Text("common.space")
                     .font(TypeStyle.body)
                     .foregroundStyle(palette.textPrimary)
                     .frame(maxWidth: .infinity, minHeight: 42)
@@ -148,8 +150,7 @@ public struct KeyboardRootView: View {
                     )
             }
             .buttonStyle(.plain)
-            .accessibilityLabel(Text("空格 · Space"))
-            Spacer(minLength: 0)
+            .accessibilityLabel(Text("common.space"))
             ToolbarIconButton(systemName: "return", label: "newline") {
                 state.insertNewline()
             }
@@ -210,13 +211,13 @@ private struct TranscriptLine: View {
         ZStack {
             switch phase {
             case .idle:
-                Text("按住说话 · Hold to talk")
+                Text("keyboard.placeholder.idle")
                     .font(TypeStyle.caption)
                     .foregroundStyle(palette.textTertiary)
             case .requestingPermissions:
                 HStack(spacing: 6) {
                     ProgressView().controlSize(.mini).tint(palette.textSecondary)
-                    Text("准备中… · Preparing")
+                    Text("keyboard.placeholder.preparing")
                         .font(TypeStyle.caption)
                         .foregroundStyle(palette.textSecondary)
                 }
@@ -230,7 +231,7 @@ private struct TranscriptLine: View {
             case .processing:
                 HStack(spacing: 6) {
                     ProgressView().controlSize(.mini).tint(palette.accent)
-                    Text("处理中 · Processing")
+                    Text("keyboard.placeholder.processing")
                         .font(TypeStyle.caption)
                         .foregroundStyle(palette.textSecondary)
                 }
@@ -255,7 +256,7 @@ private struct TranscriptLine: View {
                     .contentShape(Rectangle())
                 }
                 .buttonStyle(.plain)
-                .accessibilityHint(Text("打开 OSGKeyboard 设置,可授予麦克风 / 语音识别权限。Opens the OSGKeyboard settings page where you can grant microphone or speech recognition access."))
+                .accessibilityHint(Text("keyboard.deniedHint"))
             }
         }
         .frame(maxWidth: .infinity)
@@ -360,7 +361,7 @@ private struct LocalEngineChip: View {
     var body: some View {
         HStack(spacing: 4) {
             Image(systemName: "iphone.badge.checkmark")
-            Text("本地 · On-device")
+            Text("keyboard.placeholder.localBadge")
         }
         .font(TypeStyle.caption2)
         .foregroundStyle(palette.accent)
diff --git a/OSGKeyboardExt/Views/RecordButton.swift b/OSGKeyboardExt/Views/RecordButton.swift
index ede04af..f8e0993 100644
--- a/OSGKeyboardExt/Views/RecordButton.swift
+++ b/OSGKeyboardExt/Views/RecordButton.swift
@@ -153,7 +153,7 @@ struct RecordButton: View {
         .onChange(of: phase) { _, new in
             breath = (new == .recording)
         }
-        .accessibilityLabel(Text("按住说话 · Push to talk"))
+        .accessibilityLabel(Text("keyboard.pressToTalkA11y"))
     }
 
     @State private var pressArmed: Bool = false
diff --git a/OSGKeyboardExt/en.lproj/Localizable.strings b/OSGKeyboardExt/en.lproj/Localizable.strings
new file mode 100644
index 0000000..da5b5e9
--- /dev/null
+++ b/OSGKeyboardExt/en.lproj/Localizable.strings
@@ -0,0 +1,141 @@
+/* OSGKeyboard · English localization (development language) */
+
+"OSGKeyboard" = "OSGKeyboard";
+
+/* Onboarding */
+"onboarding.welcome.subtitle" = "Hold to talk. Release for polished text, in any app.";
+"onboarding.enable.title" = "Enable OSGKeyboard";
+"onboarding.enable.step1" = "Settings → General → Keyboard → Keyboards";
+"onboarding.enable.step2" = "Tap “Add New Keyboard…” and choose OSGKeyboard";
+"onboarding.enable.step3" = "Tap OSGKeyboard and enable “Allow Full Access”";
+"onboarding.enable.step4" = "Allow Full Access is required for the microphone and LLM calls.";
+"onboarding.enable.openSettings" = "Open iOS Settings";
+"onboarding.api.title" = "Choose engine";
+"onboarding.api.subtitle" = "Local needs no API key; Cloud polishes your text via LLM.";
+"onboarding.api.localReady.title" = "No API key needed";
+"onboarding.api.localReady.body" = "Local recognition is ready to use. Tap Done to start.";
+
+/* Common navigation */
+"common.back" = "Back";
+"common.next" = "Next";
+"common.done" = "Done";
+"common.continue" = "Continue";
+"common.reset" = "Reset";
+"common.cancel" = "Cancel";
+"common.delete" = "Delete";
+"common.space" = "Space";
+"common.newline" = "Return";
+
+/* Privacy footnote (onboarding welcome page) */
+"privacy.audio.title" = "Audio stays on device";
+"privacy.audio.body" = "Transcribed locally with Apple’s speech engine.";
+"privacy.network.title" = "Only the polished text is sent";
+"privacy.network.body" = "Sent to your chosen LLM to add structure & punctuation.";
+"privacy.universal.title" = "Works everywhere";
+"privacy.universal.body" = "WeChat, Notes, Mail, ChatGPT, Claude, Cursor — anywhere a keyboard appears.";
+
+/* Home */
+"home.status.ready" = "Ready";
+"home.status.setupIncomplete" = "Setup incomplete";
+"home.hero.label" = "Tap to configure";
+"home.action.enableInSettings" = "Enable in iOS Settings";
+"home.action.editApi" = "Edit API Configuration";
+"home.action.keyboardPreview" = "Keyboard Preview (Debug)";
+"home.action.openSettingsA11y" = "Open OSGKeyboard settings";
+
+/* API settings */
+"api.baseUrl" = "Base URL";
+"api.model" = "Model";
+"api.getKey" = "Get an API key";
+"api.key" = "API Key";
+"api.key.placeholder" = "sk-…";
+"api.key.show" = "Show";
+"api.key.hide" = "Hide";
+"api.connection" = "Connection";
+"api.test.idle" = "Test connection";
+"api.test.running" = "Testing…";
+"api.test.success" = "Success · Retry";
+"api.test.failure" = "Failed · Retry";
+"api.test.connected" = "Connected";
+"api.test.missing" = "API key missing";
+"api.test.rateLimited" = "Rate limited (429)";
+"api.test.http" = "HTTP %d";
+"api.test.network" = "Network error";
+"api.test.connectedWith" = "“%@”";
+"api.test.transportWith" = "%@";
+
+/* Settings */
+"settings.title" = "Settings";
+"settings.reset.title" = "Reset all settings?";
+"settings.reset.message" = "API key, model, and base URL will be cleared.";
+"settings.reset.confirm" = "Reset all settings";
+"settings.engine.title" = "Engine";
+"settings.engine.subtitle" = "Pick the recognition engine. Local engine does transcription only, no API key needed.";
+"settings.engine.local.title" = "On-device";
+"settings.engine.local.ios26" = "Always on-device, no network.";
+"settings.engine.local.legacy" = "On-device ASR. Transcription only, no polish.";
+"settings.engine.cloud.title" = "Cloud polish";
+"settings.engine.cloud.subtitle" = "ASR + LLM polish. API key required.";
+"settings.provider.title" = "Provider";
+"settings.provider.subtitle" = "Pick the LLM that polishes your dictation.";
+"settings.api.title" = "API";
+"settings.language.title" = "Language";
+"settings.language.subtitle.cloud" = "Recognition language and text processing mode.";
+"settings.language.subtitle.local" = "Recognition language.";
+"settings.mode.title" = "Mode";
+"settings.mode.off" = "Off";
+"settings.mode.transcribe" = "Transcribe";
+"settings.mode.polish" = "Polish";
+"settings.systemPrompt.title" = "System Prompt";
+"settings.systemPrompt.reset" = "Reset";
+"settings.asrLocale" = "ASR locale";
+"settings.engineBadge.ios26" = "SpeechAnalyzer — always on-device";
+"settings.engineRow.title" = "Recognition engine";
+"settings.onDeviceOnly.title" = "On-device only";
+"settings.onDeviceOnly.body" = "Disable cloud fallback. The keyboard reports an error instead of going online.";
+"settings.legend.onDevice" = "On-device";
+"settings.legend.cloudFallback" = "Cloud fallback";
+
+/* App group error */
+"appGroup.error.title" = "App Group not configured";
+"appGroup.error.body" = "OSGKeyboard needs an App Group to share config between the main app and the keyboard extension.";
+"appGroup.error.step1" = "Create group.com.osgkeyboard.shared in the Apple Developer portal";
+"appGroup.error.step2" = "Enable it for both the main app and the keyboard extension";
+"appGroup.error.step3" = "Re-generate the provisioning profile and download it";
+
+/* Keyboard preview */
+"preview.title" = "Keyboard Preview";
+"preview.subtitle" = "Tap the disc to start/stop recording. The real keyboard uses the same layout.";
+"preview.placeholder" = "Type or tap to record";
+"preview.clear" = "Clear text";
+"preview.openSettingsA11y" = "Open OSGKeyboard settings";
+
+/* Keyboard (ext) */
+"keyboard.placeholder.idle" = "Hold to talk";
+"keyboard.placeholder.preparing" = "Preparing";
+"keyboard.placeholder.processing" = "Processing";
+"keyboard.placeholder.error" = "Polishing failed";
+"keyboard.placeholder.localBadge" = "On-device";
+"keyboard.rec" = "REC";
+"keyboard.space" = "Space";
+"keyboard.denied.mic" = "Mic denied";
+"keyboard.denied.speech" = "Speech denied";
+"keyboard.openSettingsA11y" = "Open OSGKeyboard settings";
+"keyboard.deniedHint" = "Opens the OSGKeyboard settings page where you can grant microphone or speech recognition access.";
+"keyboard.pressToTalkA11y" = "Push to talk";
+
+/* Mode chip labels (used in both ext + preview stub) */
+"mode.off" = "Off";
+"mode.transcribe" = "Transcribe";
+"mode.polish" = "Polish";
+
+/* Locale chip labels (preview stub) */
+"locale.zh-Hans" = "ZH-Hans";
+
+/* Locale menu items (settings) */
+"locale.auto"     = "Auto";
+"locale.zh-Hans"  = "Chinese (Simplified)";
+"locale.zh-Hant"  = "Chinese (Traditional)";
+"locale.en-US"    = "English (US)";
+"locale.ja-JP"    = "Japanese";
+"locale.ko-KR"    = "Korean";
diff --git a/OSGKeyboardExt/zh-Hans.lproj/Localizable.strings b/OSGKeyboardExt/zh-Hans.lproj/Localizable.strings
new file mode 100644
index 0000000..b1e291d
--- /dev/null
+++ b/OSGKeyboardExt/zh-Hans.lproj/Localizable.strings
@@ -0,0 +1,141 @@
+/* OSGKeyboard · 简体中文翻译 */
+
+"OSGKeyboard" = "OSGKeyboard";
+
+/* Onboarding */
+"onboarding.welcome.subtitle" = "按住说话,松开即得润色文字。";
+"onboarding.enable.title" = "启用 OSGKeyboard";
+"onboarding.enable.step1" = "设置 → 通用 → 键盘 → 键盘";
+"onboarding.enable.step2" = "点击「添加新键盘…」并选择 OSGKeyboard";
+"onboarding.enable.step3" = "点击 OSGKeyboard 并启用「允许完全访问」";
+"onboarding.enable.step4" = "允许完全访问是麦克风和网络调用的前提。";
+"onboarding.enable.openSettings" = "打开 iOS 设置";
+"onboarding.api.title" = "选择引擎";
+"onboarding.api.subtitle" = "Local 不需要 API Key;Cloud 用 LLM 润色文字。";
+"onboarding.api.localReady.title" = "无需配置 API Key";
+"onboarding.api.localReady.body" = "本地识别直接可用,按 Done 即可开始使用。";
+
+/* Common navigation */
+"common.back" = "返回";
+"common.next" = "下一步";
+"common.done" = "完成";
+"common.continue" = "继续";
+"common.reset" = "重置";
+"common.cancel" = "取消";
+"common.delete" = "删除";
+"common.space" = "空格";
+"common.newline" = "换行";
+
+/* Privacy footnote (onboarding welcome page) */
+"privacy.audio.title" = "音频不出本机";
+"privacy.audio.body" = "由 Apple 端侧引擎转录。";
+"privacy.network.title" = "仅发送润色后文字";
+"privacy.network.body" = "仅向所选 LLM 发送润色后文字,用于整理结构和标点。";
+"privacy.universal.title" = "处处可用";
+"privacy.universal.body" = "微信、备忘录、邮件、ChatGPT、Claude、Cursor — 任何键盘出现的地方。";
+
+/* Home */
+"home.status.ready" = "就绪";
+"home.status.setupIncomplete" = "未完成配置";
+"home.hero.label" = "点此配置";
+"home.action.enableInSettings" = "在 iOS 设置中启用";
+"home.action.editApi" = "编辑 API 配置";
+"home.action.keyboardPreview" = "键盘预览(Debug)";
+"home.action.openSettingsA11y" = "打开 OSGKeyboard 设置";
+
+/* API settings */
+"api.baseUrl" = "接口地址";
+"api.model" = "模型";
+"api.getKey" = "获取 API Key";
+"api.key" = "API Key";
+"api.key.placeholder" = "sk-…";
+"api.key.show" = "显示";
+"api.key.hide" = "隐藏";
+"api.connection" = "连接测试";
+"api.test.idle" = "测试连接";
+"api.test.running" = "测试中…";
+"api.test.success" = "成功 · 重试";
+"api.test.failure" = "失败 · 重试";
+"api.test.connected" = "连接成功";
+"api.test.missing" = "未填写 API Key";
+"api.test.rateLimited" = "API 限流 (429)";
+"api.test.http" = "HTTP %d";
+"api.test.network" = "网络错误";
+"api.test.connectedWith" = "“%@”";
+"api.test.transportWith" = "%@";
+
+/* Settings */
+"settings.title" = "设置";
+"settings.reset.title" = "重置所有设置?";
+"settings.reset.message" = "API key、model 和 base URL 都会被清空。";
+"settings.reset.confirm" = "重置所有设置";
+"settings.engine.title" = "引擎";
+"settings.engine.subtitle" = "选择识别方式。本地引擎无需 API Key,仅做语音转录。";
+"settings.engine.local.title" = "本地识别";
+"settings.engine.local.ios26" = "始终端侧,无需联网。";
+"settings.engine.local.legacy" = "端侧 ASR,仅转录,无润色。";
+"settings.engine.cloud.title" = "云端润色";
+"settings.engine.cloud.subtitle" = "ASR 转录 + LLM 润色,需要 API Key。";
+"settings.provider.title" = "提供商";
+"settings.provider.subtitle" = "选择 LLM 提供商。";
+"settings.api.title" = "接口";
+"settings.language.title" = "语言";
+"settings.language.subtitle.cloud" = "选择识别语言和文字处理模式。";
+"settings.language.subtitle.local" = "选择识别语言。";
+"settings.mode.title" = "模式";
+"settings.mode.off" = "关闭";
+"settings.mode.transcribe" = "转写";
+"settings.mode.polish" = "润色";
+"settings.systemPrompt.title" = "系统提示";
+"settings.systemPrompt.reset" = "重置";
+"settings.asrLocale" = "识别语言";
+"settings.engineBadge.ios26" = "SpeechAnalyzer — 始终端侧";
+"settings.engineRow.title" = "识别引擎";
+"settings.onDeviceOnly.title" = "仅端侧识别";
+"settings.onDeviceOnly.body" = "禁用云端回退,识别失败时会报错而非联网。";
+"settings.legend.onDevice" = "端侧识别";
+"settings.legend.cloudFallback" = "需联网";
+
+/* App group error */
+"appGroup.error.title" = "App Group 未配置";
+"appGroup.error.body" = "OSGKeyboard 需要 App Group 才能在键盘扩展和主 App 之间共享配置。";
+"appGroup.error.step1" = "在 Apple Developer 后台创建 group.com.osgkeyboard.shared";
+"appGroup.error.step2" = "主 App 和键盘扩展都启用该 App Group";
+"appGroup.error.step3" = "重新生成 provisioning profile 并下载";
+
+/* Keyboard preview */
+"preview.title" = "键盘预览";
+"preview.subtitle" = "点按 disc 开始/结束录音;真实键盘使用同样布局。";
+"preview.placeholder" = "试着输入或按 disc 录音";
+"preview.clear" = "清空";
+"preview.openSettingsA11y" = "打开 OSGKeyboard 设置";
+
+/* Keyboard (ext) */
+"keyboard.placeholder.idle" = "按住说话";
+"keyboard.placeholder.preparing" = "准备中…";
+"keyboard.placeholder.processing" = "处理中…";
+"keyboard.placeholder.error" = "润色失败";
+"keyboard.placeholder.localBadge" = "本地";
+"keyboard.rec" = "REC";
+"keyboard.space" = "空格";
+"keyboard.denied.mic" = "麦克风被拒绝";
+"keyboard.denied.speech" = "语音识别被拒绝";
+"keyboard.openSettingsA11y" = "打开 OSGKeyboard 设置";
+"keyboard.deniedHint" = "打开 OSGKeyboard 设置,可授予麦克风 / 语音识别权限。";
+"keyboard.pressToTalkA11y" = "按住说话";
+
+/* Mode chip labels */
+"mode.off" = "关闭";
+"mode.transcribe" = "转写";
+"mode.polish" = "润色";
+
+/* Locale chip labels (preview stub) */
+"locale.zh-Hans" = "简体";
+
+/* Locale menu items (settings) */
+"locale.auto"     = "跟随系统";
+"locale.zh-Hans"  = "中文(简体)";
+"locale.zh-Hant"  = "中文(繁體)";
+"locale.en-US"    = "English (US)";
+"locale.ja-JP"    = "日本語";
+"locale.ko-KR"    = "한국어";
diff --git a/OSGKeyboardShared/Models/ProviderConfig.swift b/OSGKeyboardShared/Models/ProviderConfig.swift
index 5300144..a856d6d 100644
--- a/OSGKeyboardShared/Models/ProviderConfig.swift
+++ b/OSGKeyboardShared/Models/ProviderConfig.swift
@@ -16,16 +16,18 @@ public final class ProviderConfig: ObservableObject, @unchecked Sendable {
     public static let shared = ProviderConfig()
 
     private enum Key {
-        static let providerId   = "config.providerId"
-        static let baseURL      = "config.baseURL"
+        static let providerId      = "config.providerId"
+        static let baseURL         = "config.baseURL"
         // Legacy: apiKey used to live in UserDefaults before the
         // migration. We still read it once (see init below) and then
         // delete the entry, but no other code path touches this key.
-        static let apiKeyLegacy = "config.apiKey"
-        static let model        = "config.model"
-        static let systemPrompt = "config.systemPrompt"
-        static let modeId       = "config.modeId"
-        static let localeId     = "config.localeId"
+        static let apiKeyLegacy    = "config.apiKey"
+        static let model           = "config.model"
+        static let systemPrompt    = "config.systemPrompt"
+        static let modeId          = "config.modeId"
+        static let localeId        = "config.localeId"
+        static let requiresOnDevice = "config.requiresOnDevice"
+        static let engineMode       = "config.engineMode"
     }
 
     @Published public var providerId: String {
@@ -60,6 +62,16 @@ public final class ProviderConfig: ObservableObject, @unchecked Sendable {
     @Published public var localeId: String {
         didSet { defaults.set(localeId, forKey: Key.localeId) }
     }
+    /// When `true`, forces SFSpeechRecognizer to on-device only mode.
+    /// Ignored on iOS 26+ where SpeechAnalyzer is always on-device.
+    @Published public var requiresOnDevice: Bool {
+        didSet { defaults.set(requiresOnDevice, forKey: Key.requiresOnDevice) }
+    }
+    /// "local" → on-device ASR only, no LLM polishing.
+    /// "cloud" → ASR + LLM polish (default).
+    @Published public var engineMode: String {
+        didSet { defaults.set(engineMode, forKey: Key.engineMode) }
+    }
 
     public var isConfigured: Bool {
         !baseURL.isEmpty && !apiKey.isEmpty && !model.isEmpty
@@ -89,8 +101,10 @@ public final class ProviderConfig: ObservableObject, @unchecked Sendable {
         self.model        = defaults.string(forKey: Key.model)      ?? preset.defaultModel
         self.systemPrompt = defaults.string(forKey: Key.systemPrompt)
             ?? AppGroupStore.defaultSystemPrompt(for: pid)
-        self.modeId       = defaults.string(forKey: Key.modeId)     ?? "polish"
-        self.localeId     = defaults.string(forKey: Key.localeId)   ?? "auto"
+        self.modeId          = defaults.string(forKey: Key.modeId)     ?? "polish"
+        self.localeId        = defaults.string(forKey: Key.localeId)   ?? "auto"
+        self.requiresOnDevice = defaults.bool(forKey: Key.requiresOnDevice)
+        self.engineMode       = defaults.string(forKey: Key.engineMode) ?? "cloud"
     }
 
     /// Read the API key from the Keychain, falling back to a one-time
diff --git a/OSGKeyboardShared/Services/AppGroupStore.swift b/OSGKeyboardShared/Services/AppGroupStore.swift
index 0937cb9..d520ad0 100644
--- a/OSGKeyboardShared/Services/AppGroupStore.swift
+++ b/OSGKeyboardShared/Services/AppGroupStore.swift
@@ -21,12 +21,14 @@ public struct AppGroupStore: @unchecked Sendable {
     // MARK: - Keys
 
     private enum Key {
-        static let providerId   = "config.providerId"
-        static let baseURL      = "config.baseURL"
-        static let model        = "config.model"
-        static let systemPrompt = "config.systemPrompt"
-        static let modeId       = "config.modeId"
-        static let localeId     = "config.localeId"
+        static let providerId      = "config.providerId"
+        static let baseURL         = "config.baseURL"
+        static let model           = "config.model"
+        static let systemPrompt    = "config.systemPrompt"
+        static let modeId          = "config.modeId"
+        static let localeId        = "config.localeId"
+        static let requiresOnDevice = "config.requiresOnDevice"
+        static let engineMode       = "config.engineMode"
     }
 
     // MARK: - Reads
@@ -62,6 +64,19 @@ public struct AppGroupStore: @unchecked Sendable {
         defaults.string(forKey: Key.localeId) ?? "auto"
     }
 
+    /// When `true`, `SFSpeechRecognizer` is forced to on-device mode
+    /// (`requiresOnDeviceRecognition = true`). Ignored on iOS 26+ where
+    /// `SpeechAnalyzer` is always on-device.
+    public var requiresOnDevice: Bool {
+        defaults.bool(forKey: Key.requiresOnDevice)
+    }
+
+    /// "local" → on-device ASR only, no LLM polishing.
+    /// "cloud" → ASR + LLM polish (default behaviour).
+    public var engineMode: String {
+        defaults.string(forKey: Key.engineMode) ?? "cloud"
+    }
+
     // MARK: - Writes
 
     public func setModeId(_ id: String) {
@@ -72,6 +87,14 @@ public struct AppGroupStore: @unchecked Sendable {
         defaults.set(id, forKey: Key.localeId)
     }
 
+    public func setRequiresOnDevice(_ value: Bool) {
+        defaults.set(value, forKey: Key.requiresOnDevice)
+    }
+
+    public func setEngineMode(_ mode: String) {
+        defaults.set(mode, forKey: Key.engineMode)
+    }
+
     // MARK: - Client
 
     public func makeClient() -> LLMClient {
diff --git a/OSGKeyboardShared/Services/KeyboardState.swift b/OSGKeyboardShared/Services/KeyboardState.swift
index a89429d..86767b3 100644
--- a/OSGKeyboardShared/Services/KeyboardState.swift
+++ b/OSGKeyboardShared/Services/KeyboardState.swift
@@ -68,17 +68,27 @@ public final class KeyboardState: ObservableObject {
     /// ASR for Japanese). Updated once per recording by the ASR
     /// pipeline before any `.partial` is emitted.
     @Published public var onDeviceSupported: Bool = false
+    /// When `true`, `SFSpeechRecognizer` is forced to on-device mode.
+    /// Ignored on iOS 26+ where `SpeechAnalyzer` is always on-device.
+    @Published public var requiresOnDevice: Bool = false
+    /// "local" → ASR only, no LLM. "cloud" → ASR + optional LLM polish.
+    @Published public var engineMode: String = "cloud"
+
+    /// Convenience shorthand used by the pipeline and views.
+    public var isLocalEngine: Bool { engineMode == "local" }
 
     // Action hooks — injected by the view controller at install time.
-    public var beginRecording: () -> Void = {}
-    public var endRecording:   () -> Void = {}
-    public var tapMic:         () -> Void = {}
-    public var openSettings:   () -> Void = {}
-    public var setMode:        (InputMode) -> Void = { _ in }
-    public var setLocale:      (String) -> Void = { _ in }
-    public var insertNewline:  () -> Void = {}
-    public var insertSpace:    () -> Void = {}
-    public var deleteBackward: () -> Void = {}
+    public var beginRecording:      () -> Void = {}
+    public var endRecording:        () -> Void = {}
+    public var tapMic:              () -> Void = {}
+    public var openSettings:        () -> Void = {}
+    public var setMode:             (InputMode) -> Void = { _ in }
+    public var setLocale:           (String) -> Void = { _ in }
+    public var setRequiresOnDevice:  (Bool) -> Void = { _ in }
+    public var setEngineMode:        (String) -> Void = { _ in }
+    public var insertNewline:       () -> Void = {}
+    public var insertSpace:         () -> Void = {}
+    public var deleteBackward:      () -> Void = {}
 
     // MARK: - Preview helpers (DEBUG only)
 
diff --git a/project.yml b/project.yml
index 9830162..dfe0ed9 100644
--- a/project.yml
+++ b/project.yml
@@ -54,12 +54,21 @@ targets:
           - com.osgkeyboard.shared
     resources:
       - path: OSGKeyboard/Assets.xcassets
+      - path: OSGKeyboard/en.lproj
+      - path: OSGKeyboard/zh-Hans.lproj
     info:
       path: OSGKeyboard/Info.plist
       properties:
         CFBundleDisplayName: OSGKeyboard
         CFBundleShortVersionString: "$(MARKETING_VERSION)"
         CFBundleVersion: "$(CURRENT_PROJECT_VERSION)"
+        # English is the development language; zh-Hans is the only
+        # translation right now. The list also tells iOS to surface
+        # the keyboard in the per-app language picker for both.
+        CFBundleDevelopmentRegion: en
+        CFBundleLocalizations:
+          - en
+          - zh-Hans
         UILaunchScreen:
           UIColorName: "BackgroundColor"
         UISupportedInterfaceOrientations:
@@ -94,6 +103,11 @@ targets:
     platform: iOS
     sources:
       - path: OSGKeyboardExt
+        excludes:
+          - "en.lproj"
+          - "zh-Hans.lproj"
+      - path: OSGKeyboardExt/en.lproj
+      - path: OSGKeyboardExt/zh-Hans.lproj
     settings:
       base:
         IPHONEOS_DEPLOYMENT_TARGET: "18.0"