feature: expand interface support to 15 languages - #346
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- Extend dashboard banner locales and translation prompts to include `tr` - Allow legacy ten-locale banner records to remain readable until Turkish is added - Update admin and public banner responses to preserve missing translations - Add backend and frontend tests for Turkish source and legacy banner editing - Update UI locale lists, version badges, and What’s New version strings to `1.9.25` - Refresh changelog and localization files for the Turkish interface release - Update specs and version metadata to reflect eleven supported locales
- Replace hardcoded tooltips, aria labels, and sr-only text with locale strings across chat, feedback, flashcards, phrasebook, layout, loading, landing nav, sheet, and word tooltip components - Add missing translation keys for delete, menu open/close, voice session, copy phrase, and vote actions in all supported locales - Update assistant avatar alt text from Tutor to Lingu in chat and transcript components - Start review prompt in a checking state, reset it when closed, and wait for the existing-review lookup before showing the rating form - Extend frontend tests to cover localized labels, vote toggle label updates, loading-state behavior, and translated close labels - Document localized tooltip and accessibility text behavior in frontend architecture specs and review prompt flow in review specs - Record the fixes in the changelog
- Add Swedish to supported UI, native language, and dashboard banner locale lists - Extend backend email, lesson feedback, voice session, and month-name localization for sv - Update dashboard banner translation prompts and schemas to require twelve locales - Add Swedish translations to message catalogs and refresh Whats New copy - Update frontend locale detection, admin UI options, and registration/profile language pickers - Add tests covering Swedish locale handling, banner translation, and middleware detection
- Reflow the DashboardBannerLocale type alias across multiple lines - Keep the allowed locale set unchanged while improving readability
- Add `da` to supported locales, UI locale lists, and locale detection - Include Danish translations for emails, lesson feedback, voice titles, and month names - Extend dashboard banner schemas, translation prompt, and tests for 13 locales - Add Danish message catalog and update frontend/i18n tests to include it - Document Danish in the README and changelog
- Combine Turkish, Swedish, and Danish language additions into a single changelog entry - Clarify that the three languages are available for interface and native-language options, not study languages - Update dashboard announcements language support wording to cover source and translation use
- Add fi to supported UI, native language, and dashboard banner locale sets - Extend dashboard banner translation prompt, schemas, and admin validation for Finnish - Add Finnish voice session titles, month names, and lesson feedback strings - Add Finnish verification, password reset, welcome, deletion, contact, feedback, and review email templates - Introduce fi message catalog and update existing locale catalogs with Finnish names - Update frontend locale lists, locale detection, onboarding, and admin banner handling for fi - Add tests covering Finnish auth, middleware detection, voice titles, and banner translation flows
- Add `hr` to supported auth, admin, UI, and dashboard banner locale sets - Extend dashboard banner translation handling to 15 locales and update tests - Add Croatian answer feedback, voice session titles, month names, and email templates - Add Croatian UI strings to message catalogs and locale detection logic - Update frontend locale lists, registration, settings, and admin screens to include `hr` - Add tests for Croatian auth, middleware detection, pluralization, and banner flows
- Resolve grammar, vocabulary, and phrasebook native-language help through the `languages` catalog - Add localized FAQ text clarifying that public registration is disabled by default in NL, PL, RO, and RU - Format voice conversation titles with Danish and Finnish ordinal day punctuation - Expand voice conversation tests for Danish and Finnish title formatting - Document native-language help label resolution and voice title date rules in specs
- Use the active UI locale for dates, numbers, prices, and counts across feedback, reviews, admin users, progress, onboarding, billing, assessment, and conversation flows - Localize admin author badges and flashcards, grammar, vocabulary, and paywall copy with translated strings and plural forms - Add shared error-message translations and update vocabulary set labels to use ICU plurals in all supported locales - Fix German voice-session date formatting to use an ordinal day suffix - Update the dashboard banner source-locale selector to load the selected translation before saving - Expand and adjust frontend and i18n tests for locale-aware formatting, pluralization, and banner source selection - Refresh changelog and API spec notes for the fifteen-locale banner and localization changes
- Mock `fetchMyReview` with a deferred promise in the rating plus comment test - Resolve the pending review lookup inside `act` before asserting validation state - Keep the test aligned with async review loading behavior
- Use translated target-language labels in admin reviews and language bubbles - Replace star and review aria labels with locale-aware rating strings - Localize payment recovery titles and descriptions in billing banners - Map auth, assessment, chat, onboarding, profile, and settings failures to generic translated errors - Handle known validation and quota cases with localized messages in login, register, reset password, and chat - Update tests and specs for localized error handling and rating labels
- Pass the selected locale into email template rendering and set HTML lang accordingly - Update transactional email tests to verify rendered locale declarations - Sync locale cookies on profile save and reload only when the displayed locale changes - Enforce 10-25 character password length on reset and surface requirements in the UI - Localize conversation error codes and hide backend transport diagnostics from users - Add translated voice trial and speech error strings across supported locales - Fix Croatian comment pluralization and extend plural coverage tests - Update password reset and voice message localization tests to cover the new behavior
- Preserve supported `NEXT_LOCALE` cookies during initial browser locale detection - Ignore `Accept-Language` entries with zero or out-of-range quality values - Update admin language code comments to match supported native-language locales - Add ICU plural forms for Danish, Finnish, Swedish, and Croatian messages - Document locale resolution behavior changes in platform instructions - Record the locale detection fix in the changelog
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Summary
Validation
./scripts/format.sh— no changes; backendpytest -v— 1,432 passed, 85.90% coverage; frontendnpm run lint,npx tsc --noEmit,npm run test:run— 628 passed.