feat: Add Text-to-Speech settings and customization options

- Introduced new preference keys for TTS settings: voice, speech rate, pitch, and volume.
- Updated SettingsService to handle TTS settings and persist them.
- Enhanced AppSettings to include TTS-related properties.
- Implemented TTS settings UI in AppCustomizationPage, allowing users to select voice and adjust speech parameters.
- Added localization support for TTS settings in multiple languages.

lib/core/persistence/persistence_keys.dart

@@ -21,6 +21,10 @@ final class PreferenceKeys {
   static const String localeCode = 'locale_code_v1';
   static const String onboardingSeen = 'onboarding_seen_v1';
   static const String reviewerMode = 'reviewer_mode_v1';
+  static const String ttsVoice = 'tts_voice';
+  static const String ttsSpeechRate = 'tts_speech_rate';
+  static const String ttsPitch = 'tts_pitch';
+  static const String ttsVolume = 'tts_volume';
 }
 
 final class LegacyPreferenceKeys {

lib/core/services/settings_service.dart

@@ -136,6 +136,12 @@ class SettingsService {
           (box.get(_quickPillsKey) as List<dynamic>?) ?? const <String>[],
         ),
         sendOnEnter: (box.get(_sendOnEnterKey) as bool?) ?? false,
+        ttsVoice: box.get(PreferenceKeys.ttsVoice) as String?,
+        ttsSpeechRate:
+            (box.get(PreferenceKeys.ttsSpeechRate) as num?)?.toDouble() ?? 0.5,
+        ttsPitch: (box.get(PreferenceKeys.ttsPitch) as num?)?.toDouble() ?? 1.0,
+        ttsVolume:
+            (box.get(PreferenceKeys.ttsVolume) as num?)?.toDouble() ?? 1.0,
       ),
     );
   }
@@ -155,6 +161,9 @@ class SettingsService {
       _socketTransportModeKey: settings.socketTransportMode,
       _quickPillsKey: settings.quickPills.take(2).toList(),
       _sendOnEnterKey: settings.sendOnEnter,
+      PreferenceKeys.ttsSpeechRate: settings.ttsSpeechRate,
+      PreferenceKeys.ttsPitch: settings.ttsPitch,
+      PreferenceKeys.ttsVolume: settings.ttsVolume,
     };
 
     await box.putAll(updates);
@@ -170,6 +179,12 @@ class SettingsService {
     } else {
       await box.delete(_voiceLocaleKey);
     }
+
+    if (settings.ttsVoice != null && settings.ttsVoice!.isNotEmpty) {
+      await box.put(PreferenceKeys.ttsVoice, settings.ttsVoice);
+    } else {
+      await box.delete(PreferenceKeys.ttsVoice);
+    }
   }
 
   // Voice input specific settings
@@ -295,6 +310,10 @@ class AppSettings {
   final String socketTransportMode; // 'auto' or 'ws'
   final List<String> quickPills; // e.g., ['web','image']
   final bool sendOnEnter;
+  final String? ttsVoice;
+  final double ttsSpeechRate;
+  final double ttsPitch;
+  final double ttsVolume;
   const AppSettings({
     this.reduceMotion = false,
     this.animationSpeed = 1.0,
@@ -309,6 +328,10 @@ class AppSettings {
     this.socketTransportMode = 'ws',
     this.quickPills = const [],
     this.sendOnEnter = false,
+    this.ttsVoice,
+    this.ttsSpeechRate = 0.5,
+    this.ttsPitch = 1.0,
+    this.ttsVolume = 1.0,
   });
 
   AppSettings copyWith({
@@ -325,6 +348,10 @@ class AppSettings {
     String? socketTransportMode,
     List<String>? quickPills,
     bool? sendOnEnter,
+    Object? ttsVoice = const _DefaultValue(),
+    double? ttsSpeechRate,
+    double? ttsPitch,
+    double? ttsVolume,
   }) {
     return AppSettings(
       reduceMotion: reduceMotion ?? this.reduceMotion,
@@ -344,6 +371,10 @@ class AppSettings {
       socketTransportMode: socketTransportMode ?? this.socketTransportMode,
       quickPills: quickPills ?? this.quickPills,
       sendOnEnter: sendOnEnter ?? this.sendOnEnter,
+      ttsVoice: ttsVoice is _DefaultValue ? this.ttsVoice : ttsVoice as String?,
+      ttsSpeechRate: ttsSpeechRate ?? this.ttsSpeechRate,
+      ttsPitch: ttsPitch ?? this.ttsPitch,
+      ttsVolume: ttsVolume ?? this.ttsVolume,
     );
   }
 
@@ -362,6 +393,10 @@ class AppSettings {
         other.voiceHoldToTalk == voiceHoldToTalk &&
         other.voiceAutoSendFinal == voiceAutoSendFinal &&
         other.sendOnEnter == sendOnEnter &&
+        other.ttsVoice == ttsVoice &&
+        other.ttsSpeechRate == ttsSpeechRate &&
+        other.ttsPitch == ttsPitch &&
+        other.ttsVolume == ttsVolume &&
         _listEquals(other.quickPills, quickPills);
     // socketTransportMode intentionally not included in == to avoid frequent rebuilds
   }
@@ -381,6 +416,10 @@ class AppSettings {
       voiceAutoSendFinal,
       socketTransportMode,
       sendOnEnter,
+      ttsVoice,
+      ttsSpeechRate,
+      ttsPitch,
+      ttsVolume,
       Object.hashAllUnordered(quickPills),
     );
   }
@@ -484,6 +523,26 @@ class AppSettingsNotifier extends _$AppSettingsNotifier {
     await SettingsService.setSendOnEnter(value);
   }
 
+  Future<void> setTtsVoice(String? voice) async {
+    state = state.copyWith(ttsVoice: voice);
+    await SettingsService.saveSettings(state);
+  }
+
+  Future<void> setTtsSpeechRate(double rate) async {
+    state = state.copyWith(ttsSpeechRate: rate);
+    await SettingsService.saveSettings(state);
+  }
+
+  Future<void> setTtsPitch(double pitch) async {
+    state = state.copyWith(ttsPitch: pitch);
+    await SettingsService.saveSettings(state);
+  }
+
+  Future<void> setTtsVolume(double volume) async {
+    state = state.copyWith(ttsVolume: volume);
+    await SettingsService.saveSettings(state);
+  }
+
   Future<void> resetToDefaults() async {
     const defaultSettings = AppSettings();
     await SettingsService.saveSettings(defaultSettings);

lib/features/chat/providers/text_to_speech_provider.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import '../../../core/services/settings_service.dart';
 import '../../../core/utils/markdown_to_text.dart';
 import '../services/text_to_speech_service.dart';
 
@@ -58,6 +59,7 @@ class TextToSpeechController extends Notifier<TextToSpeechState> {
   @override
   TextToSpeechState build() {
     _service = ref.watch(textToSpeechServiceProvider);
+
     if (!_handlersBound) {
       _handlersBound = true;
       _service.bindHandlers(
@@ -73,6 +75,19 @@ class TextToSpeechController extends Notifier<TextToSpeechState> {
         unawaited(_service.stop());
       });
     }
+
+    // Listen to settings changes and update TTS when initialized
+    ref.listen<AppSettings>(appSettingsProvider, (previous, next) {
+      if (_service.isInitialized && _service.isAvailable) {
+        _service.updateSettings(
+          voice: next.ttsVoice,
+          speechRate: next.ttsSpeechRate,
+          pitch: next.ttsPitch,
+          volume: next.ttsVolume,
+        );
+      }
+    }, fireImmediately: false);
+
     return const TextToSpeechState();
   }
 
@@ -87,8 +102,14 @@ class TextToSpeechController extends Notifier<TextToSpeechState> {
       clearErrorMessage: true,
     );
 
+    final settings = ref.read(appSettingsProvider);
     final future = _service
-        .initialize()
+        .initialize(
+          voice: settings.ttsVoice,
+          speechRate: settings.ttsSpeechRate,
+          pitch: settings.ttsPitch,
+          volume: settings.ttsVolume,
+        )
         .then((available) {
           if (!ref.mounted) {
             return available;

lib/features/chat/services/text_to_speech_service.dart

@@ -47,7 +47,12 @@ class TextToSpeechService {
   }
 
   /// Initialize the native TTS engine lazily
-  Future<bool> initialize() async {
+  Future<bool> initialize({
+    String? voice,
+    double speechRate = 0.5,
+    double pitch = 1.0,
+    double volume = 1.0,
+  }) async {
     if (_initialized) {
       return _available;
     }
@@ -55,14 +60,14 @@ class TextToSpeechService {
     try {
       await _tts.awaitSpeakCompletion(false);
 
-      // Set volume to maximum
+      // Set volume
-      await _tts.setVolume(1.0);
+      await _tts.setVolume(volume);
 
-      // Set speech rate (1.0 is normal)
+      // Set speech rate
-      await _tts.setSpeechRate(0.5);
+      await _tts.setSpeechRate(speechRate);
 
-      // Set pitch (1.0 is normal)
+      // Set pitch
-      await _tts.setPitch(1.0);
+      await _tts.setPitch(pitch);
 
       if (!kIsWeb && Platform.isIOS) {
         await _tts.setSharedInstance(true);
@@ -74,7 +79,8 @@ class TextToSpeechService {
         ]);
       }
 
-      await _configurePreferredVoice();
+      // Set the voice (specific or default)
+      await _setVoiceByName(voice);
       _available = true;
     } catch (e) {
       _available = false;
@@ -140,6 +146,114 @@ class TextToSpeechService {
     await stop();
   }
 
+  /// Update TTS settings on-the-fly
+  Future<void> updateSettings({
+    String? voice,
+    double? speechRate,
+    double? pitch,
+    double? volume,
+  }) async {
+    if (!_initialized || !_available) {
+      return;
+    }
+
+    try {
+      if (volume != null) {
+        await _tts.setVolume(volume);
+      }
+      if (speechRate != null) {
+        await _tts.setSpeechRate(speechRate);
+      }
+      if (pitch != null) {
+        await _tts.setPitch(pitch);
+      }
+      // Set specific voice by name
+      await _setVoiceByName(voice);
+    } catch (e) {
+      _onError?.call(e.toString());
+    }
+  }
+
+  /// Set voice by name, or use system default if null
+  Future<void> _setVoiceByName(String? voiceName) async {
+    if (kIsWeb || (!Platform.isIOS && !Platform.isAndroid)) {
+      return;
+    }
+
+    try {
+      if (voiceName == null) {
+        // Use system default - reset voice configuration
+        _voiceConfigured = false;
+        await _configurePreferredVoice();
+        return;
+      }
+
+      // Get all available voices
+      final voicesRaw = await _tts.getVoices;
+      if (voicesRaw is! List) {
+        return;
+      }
+
+      // Find the voice by name
+      Map<String, dynamic>? targetVoice;
+      for (final entry in voicesRaw) {
+        if (entry is Map) {
+          final normalized = _normalizeVoiceEntry(entry);
+          final name = normalized['name'] as String?;
+          if (name == voiceName) {
+            targetVoice = normalized;
+            break;
+          }
+        }
+      }
+
+      // Set the voice if found
+      if (targetVoice != null) {
+        await _tts.setVoice(_voiceCommandFrom(targetVoice));
+        _voiceConfigured = true;
+      } else {
+        // Voice not found, fall back to default
+        _voiceConfigured = false;
+        await _configurePreferredVoice();
+      }
+    } catch (e) {
+      _onError?.call(e.toString());
+    }
+  }
+
+  /// Get available voices from the TTS engine
+  Future<List<Map<String, dynamic>>> getAvailableVoices() async {
+    if (!_initialized) {
+      await initialize();
+    }
+
+    if (!_available) {
+      return [];
+    }
+
+    try {
+      final voicesRaw = await _tts.getVoices;
+      if (voicesRaw is! List) {
+        return [];
+      }
+
+      final parsedVoices = <Map<String, dynamic>>[];
+      for (final entry in voicesRaw) {
+        if (entry is Map) {
+          final normalized = _normalizeVoiceEntry(entry);
+          if (normalized.isNotEmpty) {
+            parsedVoices.add(normalized);
+          }
+        }
+      }
+
+      return parsedVoices;
+    } catch (e) {
+      _onError?.call(e.toString());
+      return [];
+    }
+  }
+
   Future<void> _configurePreferredVoice() async {
     if (_voiceConfigured) {
       return;

lib/features/profile/views/app_customization_page.dart

@@ -13,6 +13,7 @@ import '../../../shared/widgets/conduit_components.dart';
 import '../../../shared/utils/ui_utils.dart';
 import '../../../core/providers/app_providers.dart';
 import '../../../l10n/app_localizations.dart';
+import '../../chat/providers/text_to_speech_provider.dart';
 
 class AppCustomizationPage extends ConsumerWidget {
   const AppCustomizationPage({super.key});
@@ -66,6 +67,8 @@ class AppCustomizationPage extends ConsumerWidget {
             _buildQuickPillsSection(context, ref, settings),
             const SizedBox(height: Spacing.xl),
             _buildChatSection(context, ref, settings),
+            const SizedBox(height: Spacing.xl),
+            _buildTtsSection(context, ref, settings),
           ],
         ),
       ),
@@ -484,6 +487,613 @@ class AppCustomizationPage extends ConsumerWidget {
     );
   }
 
+  Widget _buildTtsSection(
+    BuildContext context,
+    WidgetRef ref,
+    AppSettings settings,
+  ) {
+    final theme = context.conduitTheme;
+    final l10n = AppLocalizations.of(context)!;
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Text(
+          l10n.ttsSettings,
+          style:
+              theme.headingSmall?.copyWith(color: theme.textPrimary) ??
+              TextStyle(color: theme.textPrimary, fontSize: 18),
+        ),
+        const SizedBox(height: Spacing.sm),
+        // Voice Selection
+        _CustomizationTile(
+          leading: _buildIconBadge(
+            context,
+            Platform.isIOS ? CupertinoIcons.speaker_3 : Icons.record_voice_over,
+            color: theme.buttonPrimary,
+          ),
+          title: l10n.ttsVoice,
+          subtitle: _getDisplayVoiceName(
+            settings.ttsVoice,
+            l10n.ttsSystemDefault,
+          ),
+          onTap: () => _showVoicePickerSheet(context, ref, settings),
+        ),
+        const SizedBox(height: Spacing.xs),
+        // Speech Rate Slider
+        _buildSliderTile(
+          context,
+          ref,
+          icon: Platform.isIOS ? CupertinoIcons.speedometer : Icons.speed,
+          title: l10n.ttsSpeechRate,
+          value: settings.ttsSpeechRate,
+          min: 0.25,
+          max: 2.0,
+          divisions: 7,
+          label: '${(settings.ttsSpeechRate * 100).round()}%',
+          onChanged: (value) =>
+              ref.read(appSettingsProvider.notifier).setTtsSpeechRate(value),
+        ),
+        const SizedBox(height: Spacing.xs),
+        // Pitch Slider
+        _buildSliderTile(
+          context,
+          ref,
+          icon: Platform.isIOS ? CupertinoIcons.waveform : Icons.graphic_eq,
+          title: l10n.ttsPitch,
+          value: settings.ttsPitch,
+          min: 0.5,
+          max: 2.0,
+          divisions: 6,
+          label: settings.ttsPitch.toStringAsFixed(1),
+          onChanged: (value) =>
+              ref.read(appSettingsProvider.notifier).setTtsPitch(value),
+        ),
+        const SizedBox(height: Spacing.xs),
+        // Volume Slider
+        _buildSliderTile(
+          context,
+          ref,
+          icon: Platform.isIOS ? CupertinoIcons.volume_up : Icons.volume_up,
+          title: l10n.ttsVolume,
+          value: settings.ttsVolume,
+          min: 0.0,
+          max: 1.0,
+          divisions: 10,
+          label: '${(settings.ttsVolume * 100).round()}%',
+          onChanged: (value) =>
+              ref.read(appSettingsProvider.notifier).setTtsVolume(value),
+        ),
+        const SizedBox(height: Spacing.xs),
+        // Preview Button
+        _CustomizationTile(
+          leading: _buildIconBadge(
+            context,
+            Platform.isIOS ? CupertinoIcons.play_fill : Icons.play_arrow,
+            color: theme.buttonSecondary,
+          ),
+          title: l10n.ttsPreview,
+          subtitle: l10n.ttsPreviewText,
+          onTap: () => _previewTtsVoice(context, ref),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildSliderTile(
+    BuildContext context,
+    WidgetRef ref, {
+    required IconData icon,
+    required String title,
+    required double value,
+    required double min,
+    required double max,
+    required int divisions,
+    required String label,
+    required ValueChanged<double> onChanged,
+  }) {
+    final theme = context.conduitTheme;
+    return ConduitCard(
+      padding: const EdgeInsets.all(Spacing.md),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            children: [
+              _buildIconBadge(context, icon, color: theme.buttonSecondary),
+              const SizedBox(width: Spacing.sm),
+              Expanded(
+                child: Text(
+                  title,
+                  style:
+                      theme.bodyMedium?.copyWith(
+                        color: theme.textPrimary,
+                        fontWeight: FontWeight.w500,
+                      ) ??
+                      TextStyle(color: theme.textPrimary, fontSize: 14),
+                ),
+              ),
+              Text(
+                label,
+                style:
+                    theme.bodyMedium?.copyWith(
+                      color: theme.textSecondary,
+                      fontWeight: FontWeight.w500,
+                    ) ??
+                    TextStyle(color: theme.textSecondary, fontSize: 14),
+              ),
+            ],
+          ),
+          Slider(
+            value: value,
+            min: min,
+            max: max,
+            divisions: divisions,
+            onChanged: onChanged,
+          ),
+        ],
+      ),
+    );
+  }
+
+  Future<void> _showVoicePickerSheet(
+    BuildContext context,
+    WidgetRef ref,
+    AppSettings settings,
+  ) async {
+    final l10n = AppLocalizations.of(context)!;
+    final theme = context.conduitTheme;
+    final ttsService = ref.read(textToSpeechServiceProvider);
+
+    // Fetch available voices
+    final allVoices = await ttsService.getAvailableVoices();
+
+    if (!context.mounted) return;
+
+    if (allVoices.isEmpty) {
+      // Show error if no voices available
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(l10n.ttsNoVoicesAvailable),
+          backgroundColor: theme.error,
+        ),
+      );
+      return;
+    }
+
+    // Get the app's current locale
+    final appLocale = ref.read(appLocaleProvider);
+    final appLanguageCode =
+        appLocale?.languageCode ?? Localizations.localeOf(context).languageCode;
+
+    // Filter and sort voices: prioritize matching app language
+    final matchingVoices = <Map<String, dynamic>>[];
+    final otherVoices = <Map<String, dynamic>>[];
+
+    for (final voice in allVoices) {
+      final voiceName = voice['name'] as String? ?? '';
+      final voiceLocale = voice['locale'] as String? ?? '';
+
+      // Check if voice matches app language (e.g., 'en' matches 'en-us', 'en-gb')
+      final matchesLanguage =
+          voiceName.toLowerCase().startsWith(appLanguageCode) ||
+          voiceLocale.toLowerCase().startsWith(appLanguageCode);
+
+      if (matchesLanguage) {
+        matchingVoices.add(voice);
+      } else {
+        otherVoices.add(voice);
+      }
+    }
+
+    // Sort each group alphabetically by name
+    matchingVoices.sort((a, b) {
+      final nameA = a['name'] as String? ?? '';
+      final nameB = b['name'] as String? ?? '';
+      return nameA.compareTo(nameB);
+    });
+
+    otherVoices.sort((a, b) {
+      final nameA = a['name'] as String? ?? '';
+      final nameB = b['name'] as String? ?? '';
+      return nameA.compareTo(nameB);
+    });
+
+    // Combine: matching voices first, then others
+    final voices = [...matchingVoices, ...otherVoices];
+
+    showModalBottomSheet<void>(
+      context: context,
+      backgroundColor: theme.surfaceBackground,
+      isScrollControlled: true,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
+      ),
+      builder: (BuildContext sheetContext) {
+        return DraggableScrollableSheet(
+          initialChildSize: 0.7,
+          minChildSize: 0.5,
+          maxChildSize: 0.95,
+          expand: false,
+          builder: (context, scrollController) {
+            return Column(
+              children: [
+                // Header
+                Padding(
+                  padding: const EdgeInsets.all(Spacing.md),
+                  child: Row(
+                    children: [
+                      Text(
+                        l10n.ttsSelectVoice,
+                        style:
+                            theme.headingSmall?.copyWith(
+                              color: theme.textPrimary,
+                            ) ??
+                            TextStyle(
+                              color: theme.textPrimary,
+                              fontSize: 18,
+                              fontWeight: FontWeight.bold,
+                            ),
+                      ),
+                      const Spacer(),
+                      IconButton(
+                        icon: Icon(Icons.close, color: theme.iconPrimary),
+                        onPressed: () => Navigator.of(sheetContext).pop(),
+                      ),
+                    ],
+                  ),
+                ),
+                const Divider(height: 1),
+                // System Default Option
+                ListTile(
+                  leading: Icon(
+                    Platform.isIOS
+                        ? CupertinoIcons.speaker_3
+                        : Icons.record_voice_over,
+                    color: theme.iconPrimary,
+                  ),
+                  title: Text(
+                    l10n.ttsSystemDefault,
+                    style:
+                        theme.bodyMedium?.copyWith(
+                          color: theme.textPrimary,
+                          fontWeight: settings.ttsVoice == null
+                              ? FontWeight.bold
+                              : FontWeight.normal,
+                        ) ??
+                        TextStyle(color: theme.textPrimary),
+                  ),
+                  trailing: settings.ttsVoice == null
+                      ? Icon(Icons.check, color: theme.buttonPrimary)
+                      : null,
+                  onTap: () {
+                    ref.read(appSettingsProvider.notifier).setTtsVoice(null);
+                    Navigator.of(sheetContext).pop();
+                  },
+                ),
+                const Divider(height: 1),
+                // Voices List
+                Expanded(
+                  child: ListView.builder(
+                    controller: scrollController,
+                    itemCount:
+                        voices.length +
+                        (matchingVoices.isNotEmpty && otherVoices.isNotEmpty
+                            ? 2
+                            : 0),
+                    itemBuilder: (context, index) {
+                      // Show section header for matching voices
+                      if (index == 0 &&
+                          matchingVoices.isNotEmpty &&
+                          otherVoices.isNotEmpty) {
+                        return Padding(
+                          padding: const EdgeInsets.fromLTRB(16, 12, 16, 8),
+                          child: Text(
+                            l10n.ttsVoicesForLanguage(
+                              appLanguageCode.toUpperCase(),
+                            ),
+                            style:
+                                theme.bodySmall?.copyWith(
+                                  color: theme.textSecondary,
+                                  fontWeight: FontWeight.bold,
+                                ) ??
+                                TextStyle(
+                                  color: theme.textSecondary,
+                                  fontSize: 12,
+                                  fontWeight: FontWeight.bold,
+                                ),
+                          ),
+                        );
+                      }
+
+                      // Show section header for other voices
+                      if (index == matchingVoices.length + 1 &&
+                          matchingVoices.isNotEmpty &&
+                          otherVoices.isNotEmpty) {
+                        return Padding(
+                          padding: const EdgeInsets.fromLTRB(16, 12, 16, 8),
+                          child: Text(
+                            l10n.ttsOtherVoices,
+                            style:
+                                theme.bodySmall?.copyWith(
+                                  color: theme.textSecondary,
+                                  fontWeight: FontWeight.bold,
+                                ) ??
+                                TextStyle(
+                                  color: theme.textSecondary,
+                                  fontSize: 12,
+                                  fontWeight: FontWeight.bold,
+                                ),
+                          ),
+                        );
+                      }
+
+                      // Adjust index for headers
+                      int voiceIndex = index;
+                      if (matchingVoices.isNotEmpty && otherVoices.isNotEmpty) {
+                        if (index == 0) return const SizedBox.shrink();
+                        if (index <= matchingVoices.length) {
+                          voiceIndex = index - 1;
+                        } else {
+                          voiceIndex = index - 2;
+                        }
+                      }
+
+                      final voice = voices[voiceIndex];
+                      final voiceId = _getVoiceIdentifier(voice);
+                      final displayName = _formatVoiceName(voice);
+                      final subtitle = _getVoiceSubtitle(voice);
+                      final isSelected = settings.ttsVoice == voiceId;
+
+                      return ListTile(
+                        leading: Icon(
+                          Platform.isIOS
+                              ? CupertinoIcons.person_fill
+                              : Icons.person,
+                          color: theme.iconSecondary,
+                        ),
+                        title: Text(
+                          displayName,
+                          style:
+                              theme.bodyMedium?.copyWith(
+                                color: theme.textPrimary,
+                                fontWeight: isSelected
+                                    ? FontWeight.bold
+                                    : FontWeight.normal,
+                              ) ??
+                              TextStyle(color: theme.textPrimary),
+                        ),
+                        subtitle: subtitle.isNotEmpty
+                            ? Text(
+                                subtitle,
+                                style:
+                                    theme.bodySmall?.copyWith(
+                                      color: theme.textSecondary,
+                                    ) ??
+                                    TextStyle(
+                                      color: theme.textSecondary,
+                                      fontSize: 12,
+                                    ),
+                              )
+                            : null,
+                        trailing: isSelected
+                            ? Icon(Icons.check, color: theme.buttonPrimary)
+                            : null,
+                        onTap: () {
+                          ref
+                              .read(appSettingsProvider.notifier)
+                              .setTtsVoice(voiceId);
+                          Navigator.of(sheetContext).pop();
+                        },
+                      );
+                    },
+                  ),
+                ),
+              ],
+            );
+          },
+        );
+      },
+    );
+  }
+
+  Future<void> _previewTtsVoice(BuildContext context, WidgetRef ref) async {
+    final l10n = AppLocalizations.of(context)!;
+    final theme = context.conduitTheme;
+
+    try {
+      final ttsController = ref.read(textToSpeechControllerProvider.notifier);
+
+      // Try to read the state, but handle if provider is in error
+      TextToSpeechState? ttsState;
+      try {
+        ttsState = ref.read(textToSpeechControllerProvider);
+      } catch (_) {
+        // Provider is in error state, proceed anyway to initialize it
+        ttsState = null;
+      }
+
+      // Don't preview if already speaking
+      if (ttsState != null && (ttsState.isSpeaking || ttsState.isBusy)) {
+        await ttsController.stop();
+        return;
+      }
+
+      // Use the preview text from localization
+      await ttsController.toggleForMessage(
+        messageId: 'tts_preview',
+        text: l10n.ttsPreviewText,
+      );
+    } catch (e) {
+      if (!context.mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text('${l10n.error}: $e'),
+          backgroundColor: theme.error,
+        ),
+      );
+    }
+  }
+
+  String _getDisplayVoiceName(String? voiceName, String defaultLabel) {
+    if (voiceName == null || voiceName.isEmpty) {
+      return defaultLabel;
+    }
+
+    // Format Android-style voice names with # separator
+    if (voiceName.contains('#')) {
+      final parts = voiceName.split('#');
+      if (parts.length > 1) {
+        var friendlyName = parts[1]
+            .replaceAll('-local', '')
+            .replaceAll('-network', '')
+            .replaceAll('_', ' ')
+            .split(' ')
+            .map(
+              (word) =>
+                  word.isEmpty ? '' : word[0].toUpperCase() + word.substring(1),
+            )
+            .join(' ');
+
+        final localeInfo = parts[0].toUpperCase().replaceAll('_', '-');
+        return '$localeInfo - $friendlyName';
+      }
+    }
+
+    // Handle Android-style voice IDs without # (e.g., "es-us-x-sfb-local")
+    if (voiceName.contains('-x-') ||
+        voiceName.endsWith('-local') ||
+        voiceName.endsWith('-network') ||
+        voiceName.endsWith('-language')) {
+      var localePart = '';
+      var qualityPart = '';
+
+      if (voiceName.contains('-x-')) {
+        final xParts = voiceName.split('-x-');
+        localePart = xParts[0];
+        qualityPart = xParts.length > 1 ? xParts[1] : '';
+      } else if (voiceName.contains('-language')) {
+        localePart = voiceName.replaceAll('-language', '');
+      } else {
+        final dashIndex = voiceName.indexOf('-', 3);
+        if (dashIndex > 0) {
+          localePart = voiceName.substring(0, dashIndex);
+        } else {
+          localePart = voiceName;
+        }
+      }
+
+      final formattedLocale = localePart.toUpperCase();
+
+      if (qualityPart.isNotEmpty) {
+        qualityPart = qualityPart
+            .replaceAll('-local', '')
+            .replaceAll('-network', '')
+            .toUpperCase();
+        return '$formattedLocale ($qualityPart)';
+      }
+
+      return formattedLocale;
+    }
+
+    // For iOS or other platforms with proper names, return as-is
+    return voiceName;
+  }
+
+  String _formatVoiceName(Map<String, dynamic> voice) {
+    final name = voice['name'] as String? ?? 'Unknown';
+    final locale = voice['locale'] as String? ?? '';
+
+    // Handle Android-style voice IDs with # separator (e.g., "en-us-x-sfg#male_1-local")
+    if (name.contains('#')) {
+      final parts = name.split('#');
+      if (parts.length > 1) {
+        var friendlyName = parts[1]
+            .replaceAll('-local', '')
+            .replaceAll('-network', '')
+            .replaceAll('_', ' ')
+            .split(' ')
+            .map(
+              (word) =>
+                  word.isEmpty ? '' : word[0].toUpperCase() + word.substring(1),
+            )
+            .join(' ');
+
+        if (locale.isNotEmpty) {
+          final localeUpper = locale.toUpperCase().replaceAll('_', '-');
+          return '$localeUpper - $friendlyName';
+        }
+        return friendlyName;
+      }
+    }
+
+    // Handle Android-style voice IDs without # (e.g., "es-us-x-sfb-local", "ja-jp-x-htm-network")
+    if (name.contains('-x-') ||
+        name.endsWith('-local') ||
+        name.endsWith('-network') ||
+        name.endsWith('-language')) {
+      // Extract the main locale part (first 2-5 chars before -x- or other markers)
+      var localePart = '';
+      var qualityPart = '';
+
+      if (name.contains('-x-')) {
+        final xParts = name.split('-x-');
+        localePart = xParts[0];
+        qualityPart = xParts.length > 1 ? xParts[1] : '';
+      } else if (name.contains('-language')) {
+        localePart = name.replaceAll('-language', '');
+      } else {
+        // Try to extract locale (first 5 chars like "es-us" or "ja-jp")
+        final dashIndex = name.indexOf('-', 3);
+        if (dashIndex > 0) {
+          localePart = name.substring(0, dashIndex);
+        } else {
+          localePart = name;
+        }
+      }
+
+      // Format the locale part
+      final formattedLocale = localePart.toUpperCase();
+
+      // Format quality indicators
+      if (qualityPart.isNotEmpty) {
+        qualityPart = qualityPart
+            .replaceAll('-local', '')
+            .replaceAll('-network', '')
+            .toUpperCase();
+        return '$formattedLocale ($qualityPart)';
+      }
+
+      return formattedLocale;
+    }
+
+    // For iOS or other platforms with proper names, return as-is
+    return name;
+  }
+
+  String _getVoiceIdentifier(Map<String, dynamic> voice) {
+    // Use name as the unique identifier (this is what we set in settings)
+    return voice['name'] as String? ??
+        voice['identifier'] as String? ??
+        voice['id'] as String? ??
+        'unknown';
+  }
+
+  String _getVoiceSubtitle(Map<String, dynamic> voice) {
+    final locale = voice['locale'] as String? ?? '';
+    final name = voice['name'] as String? ?? '';
+
+    // If name contains technical info, show the locale part
+    if (name.contains('#')) {
+      final parts = name.split('#');
+      if (parts.isNotEmpty) {
+        final localeInfo = parts[0].toUpperCase().replaceAll('_', '-');
+        return localeInfo;
+      }
+    }
+
+    return locale.isNotEmpty ? locale : '';
+  }
+
   String _resolveLanguageLabel(BuildContext context, String code) {
     switch (code) {
       case 'en':

lib/l10n/app_de.arb

@@ -316,6 +316,19 @@
   "chatSettings": "Chat",
   "sendOnEnter": "Mit Enter senden",
   "sendOnEnterDescription": "Enter sendet (Soft-Tastatur). Cmd/Ctrl+Enter ebenfalls verfügbar",
+  "ttsSettings": "Text zu Sprache",
+  "ttsVoice": "Stimme",
+  "ttsSpeechRate": "Sprechgeschwindigkeit",
+  "ttsPitch": "Tonhöhe",
+  "ttsVolume": "Lautstärke",
+  "ttsPreview": "Stimme vorschau",
+  "ttsSystemDefault": "Systemstandard",
+  "ttsSelectVoice": "Stimme auswählen",
+  "ttsPreviewText": "Dies ist eine Vorschau der ausgewählten Stimme.",
+  "ttsNoVoicesAvailable": "Keine Stimmen verfügbar",
+  "ttsVoicesForLanguage": "{language}-Stimmen",
+  "ttsOtherVoices": "Andere Sprachen",
+  "error": "Fehler",
   "display": "Anzeige",
   "realtime": "Echtzeit",
   "transportMode": "Transportmodus",

lib/l10n/app_en.arb

@@ -650,6 +650,40 @@
   "@sendOnEnterDescription": {
     "description": "Explanation of how the Send on Enter toggle behaves."
   },
+  "ttsSettings": "Text to Speech",
+  "@ttsSettings": {"description": "Section header for TTS-related customization options."},
+  "ttsVoice": "Voice",
+  "@ttsVoice": {"description": "Title for voice selection tile."},
+  "ttsSpeechRate": "Speech Rate",
+  "@ttsSpeechRate": {"description": "Title for speech rate slider."},
+  "ttsPitch": "Pitch",
+  "@ttsPitch": {"description": "Title for pitch slider."},
+  "ttsVolume": "Volume",
+  "@ttsVolume": {"description": "Title for volume slider."},
+  "ttsPreview": "Preview Voice",
+  "@ttsPreview": {"description": "Title for preview button."},
+  "ttsSystemDefault": "System Default",
+  "@ttsSystemDefault": {"description": "Label for system default voice option."},
+  "ttsSelectVoice": "Select Voice",
+  "@ttsSelectVoice": {"description": "Title for voice picker bottom sheet."},
+  "ttsPreviewText": "This is a preview of the selected voice.",
+  "@ttsPreviewText": {"description": "Sample text spoken during voice preview."},
+  "ttsNoVoicesAvailable": "No voices available",
+  "@ttsNoVoicesAvailable": {"description": "Error message when no TTS voices can be found."},
+  "ttsVoicesForLanguage": "{language} Voices",
+  "@ttsVoicesForLanguage": {
+    "description": "Section header for voices matching the app language",
+    "placeholders": {
+      "language": {
+        "type": "String",
+        "example": "EN"
+      }
+    }
+  },
+  "ttsOtherVoices": "Other Languages",
+  "@ttsOtherVoices": {"description": "Section header for voices in other languages."},
+  "error": "Error",
+  "@error": {"description": "Generic error label."},
   "display": "Display",
   "@display": {"description": "Section header for visual and layout related settings."},
   "realtime": "Realtime",

lib/l10n/app_es.arb

@@ -309,6 +309,19 @@
   "chatSettings": "Conversación",
   "sendOnEnter": "Enviar con Enter",
   "sendOnEnterDescription": "Enter envía (teclado virtual). Cmd/Ctrl+Enter también disponible",
+  "ttsSettings": "Texto a voz",
+  "ttsVoice": "Voz",
+  "ttsSpeechRate": "Velocidad de voz",
+  "ttsPitch": "Tono",
+  "ttsVolume": "Volumen",
+  "ttsPreview": "Vista previa de voz",
+  "ttsSystemDefault": "Predeterminado del sistema",
+  "ttsSelectVoice": "Seleccionar voz",
+  "ttsPreviewText": "Esta es una vista previa de la voz seleccionada.",
+  "ttsNoVoicesAvailable": "No hay voces disponibles",
+  "ttsVoicesForLanguage": "Voces de {language}",
+  "ttsOtherVoices": "Otros idiomas",
+  "error": "Error",
   "display": "Visualización",
   "realtime": "Tiempo real",
   "transportMode": "Modo de transporte",

lib/l10n/app_fr.arb

@@ -316,6 +316,19 @@
   "chatSettings": "Discussion",
   "sendOnEnter": "Envoyer avec Entrée",
   "sendOnEnterDescription": "Entrée envoie (clavier logiciel). Cmd/Ctrl+Entrée aussi disponible",
+  "ttsSettings": "Synthèse vocale",
+  "ttsVoice": "Voix",
+  "ttsSpeechRate": "Vitesse de parole",
+  "ttsPitch": "Hauteur",
+  "ttsVolume": "Volume",
+  "ttsPreview": "Aperçu de la voix",
+  "ttsSystemDefault": "Système par défaut",
+  "ttsSelectVoice": "Sélectionner la voix",
+  "ttsPreviewText": "Ceci est un aperçu de la voix sélectionnée.",
+  "ttsNoVoicesAvailable": "Aucune voix disponible",
+  "ttsVoicesForLanguage": "Voix {language}",
+  "ttsOtherVoices": "Autres langues",
+  "error": "Erreur",
   "display": "Affichage",
   "realtime": "Temps réel",
   "transportMode": "Mode de transport",

lib/l10n/app_it.arb

@@ -316,6 +316,19 @@
   "chatSettings": "Chat",
   "sendOnEnter": "Invia con Invio",
   "sendOnEnterDescription": "Invio invia (tastiera software). Cmd/Ctrl+Invio disponibile",
+  "ttsSettings": "Sintesi vocale",
+  "ttsVoice": "Voce",
+  "ttsSpeechRate": "Velocità di sintesi vocale",
+  "ttsPitch": "Tonalità",
+  "ttsVolume": "Volume",
+  "ttsPreview": "Anteprima voce",
+  "ttsSystemDefault": "Predefinito del sistema",
+  "ttsSelectVoice": "Seleziona voce",
+  "ttsPreviewText": "Questa è un'anteprima della voce selezionata.",
+  "ttsNoVoicesAvailable": "Nessuna voce disponibile",
+  "ttsVoicesForLanguage": "Voci {language}",
+  "ttsOtherVoices": "Altre lingue",
+  "error": "Errore",
   "display": "Schermo",
   "realtime": "Tempo reale",
   "transportMode": "Modalità di trasporto",

lib/l10n/app_localizations.dart

@@ -1718,6 +1718,84 @@ abstract class AppLocalizations {
   /// **'Enter sends (soft keyboard). Cmd/Ctrl+Enter also available'**
   String get sendOnEnterDescription;
 
+  /// Section header for TTS-related customization options.
+  ///
+  /// In en, this message translates to:
+  /// **'Text to Speech'**
+  String get ttsSettings;
+
+  /// Title for voice selection tile.
+  ///
+  /// In en, this message translates to:
+  /// **'Voice'**
+  String get ttsVoice;
+
+  /// Title for speech rate slider.
+  ///
+  /// In en, this message translates to:
+  /// **'Speech Rate'**
+  String get ttsSpeechRate;
+
+  /// Title for pitch slider.
+  ///
+  /// In en, this message translates to:
+  /// **'Pitch'**
+  String get ttsPitch;
+
+  /// Title for volume slider.
+  ///
+  /// In en, this message translates to:
+  /// **'Volume'**
+  String get ttsVolume;
+
+  /// Title for preview button.
+  ///
+  /// In en, this message translates to:
+  /// **'Preview Voice'**
+  String get ttsPreview;
+
+  /// Label for system default voice option.
+  ///
+  /// In en, this message translates to:
+  /// **'System Default'**
+  String get ttsSystemDefault;
+
+  /// Title for voice picker bottom sheet.
+  ///
+  /// In en, this message translates to:
+  /// **'Select Voice'**
+  String get ttsSelectVoice;
+
+  /// Sample text spoken during voice preview.
+  ///
+  /// In en, this message translates to:
+  /// **'This is a preview of the selected voice.'**
+  String get ttsPreviewText;
+
+  /// Error message when no TTS voices can be found.
+  ///
+  /// In en, this message translates to:
+  /// **'No voices available'**
+  String get ttsNoVoicesAvailable;
+
+  /// Section header for voices matching the app language
+  ///
+  /// In en, this message translates to:
+  /// **'{language} Voices'**
+  String ttsVoicesForLanguage(String language);
+
+  /// Section header for voices in other languages.
+  ///
+  /// In en, this message translates to:
+  /// **'Other Languages'**
+  String get ttsOtherVoices;
+
+  /// Generic error label.
+  ///
+  /// In en, this message translates to:
+  /// **'Error'**
+  String get error;
+
   /// Section header for visual and layout related settings.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_de.dart

@@ -895,6 +895,48 @@ class AppLocalizationsDe extends AppLocalizations {
   String get sendOnEnterDescription =>
       'Enter sendet (Soft-Tastatur). Cmd/Ctrl+Enter ebenfalls verfügbar';
 
+  @override
+  String get ttsSettings => 'Text zu Sprache';
+
+  @override
+  String get ttsVoice => 'Stimme';
+
+  @override
+  String get ttsSpeechRate => 'Sprechgeschwindigkeit';
+
+  @override
+  String get ttsPitch => 'Tonhöhe';
+
+  @override
+  String get ttsVolume => 'Lautstärke';
+
+  @override
+  String get ttsPreview => 'Stimme vorschau';
+
+  @override
+  String get ttsSystemDefault => 'Systemstandard';
+
+  @override
+  String get ttsSelectVoice => 'Stimme auswählen';
+
+  @override
+  String get ttsPreviewText =>
+      'Dies ist eine Vorschau der ausgewählten Stimme.';
+
+  @override
+  String get ttsNoVoicesAvailable => 'Keine Stimmen verfügbar';
+
+  @override
+  String ttsVoicesForLanguage(String language) {
+    return '$language-Stimmen';
+  }
+
+  @override
+  String get ttsOtherVoices => 'Andere Sprachen';
+
+  @override
+  String get error => 'Fehler';
+
   @override
   String get display => 'Anzeige';
 

lib/l10n/app_localizations_en.dart

@@ -887,6 +887,47 @@ class AppLocalizationsEn extends AppLocalizations {
   String get sendOnEnterDescription =>
       'Enter sends (soft keyboard). Cmd/Ctrl+Enter also available';
 
+  @override
+  String get ttsSettings => 'Text to Speech';
+
+  @override
+  String get ttsVoice => 'Voice';
+
+  @override
+  String get ttsSpeechRate => 'Speech Rate';
+
+  @override
+  String get ttsPitch => 'Pitch';
+
+  @override
+  String get ttsVolume => 'Volume';
+
+  @override
+  String get ttsPreview => 'Preview Voice';
+
+  @override
+  String get ttsSystemDefault => 'System Default';
+
+  @override
+  String get ttsSelectVoice => 'Select Voice';
+
+  @override
+  String get ttsPreviewText => 'This is a preview of the selected voice.';
+
+  @override
+  String get ttsNoVoicesAvailable => 'No voices available';
+
+  @override
+  String ttsVoicesForLanguage(String language) {
+    return '$language Voices';
+  }
+
+  @override
+  String get ttsOtherVoices => 'Other Languages';
+
+  @override
+  String get error => 'Error';
+
   @override
   String get display => 'Display';
 

lib/l10n/app_localizations_fr.dart

@@ -903,6 +903,47 @@ class AppLocalizationsFr extends AppLocalizations {
   String get sendOnEnterDescription =>
       'Entrée envoie (clavier logiciel). Cmd/Ctrl+Entrée aussi disponible';
 
+  @override
+  String get ttsSettings => 'Synthèse vocale';
+
+  @override
+  String get ttsVoice => 'Voix';
+
+  @override
+  String get ttsSpeechRate => 'Vitesse de parole';
+
+  @override
+  String get ttsPitch => 'Hauteur';
+
+  @override
+  String get ttsVolume => 'Volume';
+
+  @override
+  String get ttsPreview => 'Aperçu de la voix';
+
+  @override
+  String get ttsSystemDefault => 'Système par défaut';
+
+  @override
+  String get ttsSelectVoice => 'Sélectionner la voix';
+
+  @override
+  String get ttsPreviewText => 'Ceci est un aperçu de la voix sélectionnée.';
+
+  @override
+  String get ttsNoVoicesAvailable => 'Aucune voix disponible';
+
+  @override
+  String ttsVoicesForLanguage(String language) {
+    return 'Voix $language';
+  }
+
+  @override
+  String get ttsOtherVoices => 'Autres langues';
+
+  @override
+  String get error => 'Erreur';
+
   @override
   String get display => 'Affichage';
 

lib/l10n/app_localizations_it.dart

@@ -892,6 +892,47 @@ class AppLocalizationsIt extends AppLocalizations {
   String get sendOnEnterDescription =>
       'Invio invia (tastiera software). Cmd/Ctrl+Invio disponibile';
 
+  @override
+  String get ttsSettings => 'Sintesi vocale';
+
+  @override
+  String get ttsVoice => 'Voce';
+
+  @override
+  String get ttsSpeechRate => 'Velocità di sintesi vocale';
+
+  @override
+  String get ttsPitch => 'Tonalità';
+
+  @override
+  String get ttsVolume => 'Volume';
+
+  @override
+  String get ttsPreview => 'Anteprima voce';
+
+  @override
+  String get ttsSystemDefault => 'Predefinito del sistema';
+
+  @override
+  String get ttsSelectVoice => 'Seleziona voce';
+
+  @override
+  String get ttsPreviewText => 'Questa è un\'anteprima della voce selezionata.';
+
+  @override
+  String get ttsNoVoicesAvailable => 'Nessuna voce disponibile';
+
+  @override
+  String ttsVoicesForLanguage(String language) {
+    return 'Voci $language';
+  }
+
+  @override
+  String get ttsOtherVoices => 'Altre lingue';
+
+  @override
+  String get error => 'Errore';
+
   @override
   String get display => 'Schermo';
 

lib/l10n/app_nl.arb

@@ -309,6 +309,19 @@
   "chatSettings": "Chat",
   "sendOnEnter": "Verzenden met Enter",
   "sendOnEnterDescription": "Enter verzendt (softtoetsenbord). Cmd/Ctrl+Enter ook beschikbaar",
+  "ttsSettings": "Tekst naar spraak",
+  "ttsVoice": "Stem",
+  "ttsSpeechRate": "Spraaksnelheid",
+  "ttsPitch": "Toonhoogte",
+  "ttsVolume": "Volume",
+  "ttsPreview": "Stemvoorbeeld",
+  "ttsSystemDefault": "Systeemstandaard",
+  "ttsSelectVoice": "Selecteer stem",
+  "ttsPreviewText": "Dit is een voorbeeld van de geselecteerde stem.",
+  "ttsNoVoicesAvailable": "Geen stemmen beschikbaar",
+  "ttsVoicesForLanguage": "{language} stemmen",
+  "ttsOtherVoices": "Andere talen",
+  "error": "Fout",
   "display": "Weergave",
   "realtime": "Realtime",
   "transportMode": "Transportmodus",

lib/l10n/app_ru.arb

@@ -309,6 +309,19 @@
   "chatSettings": "Чат",
   "sendOnEnter": "Отправка по Enter",
   "sendOnEnterDescription": "Enter отправляет (программная клавиатура). Также доступно Cmd/Ctrl+Enter",
+  "ttsSettings": "Преобразование текста в речь",
+  "ttsVoice": "Голос",
+  "ttsSpeechRate": "Скорость речи",
+  "ttsPitch": "Высота тона",
+  "ttsVolume": "Громкость",
+  "ttsPreview": "Предпросмотр голоса",
+  "ttsSystemDefault": "Системное значение по умолчанию",
+  "ttsSelectVoice": "Выбрать голос",
+  "ttsPreviewText": "Это предварительный просмотр выбранного голоса.",
+  "ttsNoVoicesAvailable": "Нет доступных голосов",
+  "ttsVoicesForLanguage": "Голоса {language}",
+  "ttsOtherVoices": "Другие языки",
+  "error": "Ошибка",
   "display": "Отображение",
   "realtime": "Реальное время",
   "transportMode": "Режим транспорта",

lib/l10n/app_zh.arb

@@ -309,6 +309,19 @@
   "chatSettings": "对话",
   "sendOnEnter": "回车发送",
   "sendOnEnterDescription": "回车发送（软键盘）。Cmd/Ctrl+Enter 也可用",
+  "ttsSettings": "文本转语音",
+  "ttsVoice": "语音",
+  "ttsSpeechRate": "语速",
+  "ttsPitch": "音调",
+  "ttsVolume": "音量",
+  "ttsPreview": "预览语音",
+  "ttsSystemDefault": "系统默认",
+  "ttsSelectVoice": "选择语音",
+  "ttsPreviewText": "这是所选语音的预览。",
+  "ttsNoVoicesAvailable": "没有可用的语音",
+  "ttsVoicesForLanguage": "{language} 语音",
+  "ttsOtherVoices": "其他语言",
+  "error": "错误",
   "display": "显示",
   "realtime": "实时",
   "transportMode": "传输模式",