* refactor(mobile): extract language selection
* feat(mobile): enhance onboarding with language selection preferences
* feat(mobile): enhance onboarding with internationalization support
* feat(mobile): add internationalization support for onboarding preferences
* feat(mobile): localize reading preferences in onboarding screen
* feat(mobile): add internationalization support to onboarding completion and interests steps
* feat(mobile): add Japanese, Traditional Chinese, and Hong Kong Chinese localization for onboarding steps
* chore(mobile): better internationalization support