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Prompts SwiftUI User-Preference Localization Architecture

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SwiftUI User-Preference Localization Architecture

Act as an App Localization Expert to implement a user-preference-based localization architecture in a SwiftUI app, including a LanguageManager class with UserDefaults storage, glob…

PROMPT 

Act as an App Localization Expert. You are tasked with setting up a user-preference-based localization architecture in an application independent of the phone's system language.

Your task includes:
1. **LanguageManager Class**: Create a `LanguageManager` class using the `ObservableObject` protocol. Store the user's selected language in `UserDefaults`, with the default language set to 'en' (English). Display a selection screen on the first launch.
2. **Global Locale Override**: Wrap the entire `ContentView` structure in your SwiftUI app with `.environment(\.locale, .init(identifier: languageManager.selectedLanguage))` to trigger translations based on the selected language in `LanguageManager`.
3. **Onboarding Language Selection**: If no language has been selected previously, show a stylish 'Language Selection' screen with English and Turkish options on app launch. Save the selection immediately and transition to the main screen.
4. **AI (LLM) Integration**: Add the user's selected language as a parameter in AI requests (API calls). Update the system prompt to: 'User's preferred language: ${selected_language}. Respond in this language.'
5. **String Catalogs**: Integrate `.stringxcatalog` into your project and add all existing hardcoded strings in English (base) and Turkish.
6. **Dynamic Update**: Ensure that changing the language in settings updates the UI without restarting the app.
7. **User Language Change**: Allow users to change the app's language dynamically at any time.

Rules:
- Ensure seamless user experience during language selection and updates.
- Test functionality for both English and Turkish languages.

ROLES & RULES

Role assignments

  • Act as an App Localization Expert.
  1. Ensure seamless user experience during language selection and updates.
  2. Test functionality for both English and Turkish languages.

EXPECTED OUTPUT

Format
markdown
Constraints
  • include Swift code
  • cover all listed tasks

SUCCESS CRITERIA

  • Create LanguageManager class using ObservableObject.
  • Wrap ContentView with locale environment modifier.
  • Implement onboarding language selection screen.
  • Add selected language to AI requests.
  • Integrate String Catalogs for English and Turkish.
  • Ensure dynamic UI updates on language change.
  • Allow runtime language changes.

FAILURE MODES

  • May not persist language in UserDefaults correctly.
  • Could fail to show selection on first launch.
  • Might not override system locale properly.
  • Risk of incomplete string catalog translations.
  • UI may not update without app restart.
  • AI prompts may not include language parameter.

CAVEATS

Missing context
  • Existing app codebase or ContentView structure.
  • List of hardcoded strings to localize.
  • Example of current AI API call for integration.
  • iOS/SwiftUI version requirements.
  • Details on main app screens beyond ContentView.
Ambiguities
  • 'Stylish Language Selection screen' is subjective and lacks design specifics.
  • 'Add all existing hardcoded strings' assumes knowledge of which strings exist without listing them.
  • Unclear how onboarding integrates with existing ContentView (e.g., conditional view?).
  • Location of settings screen for language change not specified.
  • AI requests assumed to exist but no example provided.

QUALITY

OVERALL
0.70
CLARITY
0.85
SPECIFICITY
0.80
REUSABILITY
0.25
COMPLETENESS
0.75

IMPROVEMENT SUGGESTIONS

  • Provide a minimal SwiftUI app template with placeholder ContentView.
  • List specific strings to add to String Catalogs for English and Turkish.
  • Include an example AI API call snippet showing where to insert the language parameter.
  • Specify exact onboarding flow, e.g., 'Use a root view that checks UserDefaults and shows selector or main content.'
  • Add requirements for iOS version and SwiftUI features used (e.g., .environment locale).

USAGE

Copy the prompt above and paste it into your AI of choice — Claude, ChatGPT, Gemini, or anywhere else you're working. Replace any placeholder sections with your own context, then ask for the output.

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