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flutter-localization

Add Flutter translation assets, locale initialization, localized strings, locale switching, and plurals with easy_localization and CSV or JSON files. Use for Flutter i18n work; not RTL-only layout or locale-specific date formatting.

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Works withGoogle Sheets

Run score Not tested

See how to install

Files included (5)

  • SKILL.md2.5 KB
  • evals/evals.json2.4 KB
  • references/implementation.md539 B
  • references/REFERENCE.md1.3 KB
  • references/sheet-loader.md1.1 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Localization

Priority: P1 (HIGH)

Format Selection

  • CSV (Recommended for teams with translators): Google Sheets compatibility via sheet_loader_localization. Store in assets/langs/.
  • JSON (Developer-friendly): Nested structure support with IDE validation. Store in assets/translations/.

Scope Boundary

  • Use this skill for translation assets, EasyLocalization bootstrap, .tr(), plural(), and a language/locale switcher.
  • Do not use it for RTL-only widget direction, typography, or locale-aware date/number formatting when translation assets are unchanged.

Structure

# CSV Format (Google Sheets workflow)
assets/langs/langs.csv

# OR JSON Format (nested keys)
assets/translations/
├── en.json
└── vi.json

Implementation Workflow

  1. Initialize — Call await EasyLocalization.ensureInitialized() before runApp.
  2. Wrap root — Wrap app with EasyLocalization widget specifying supported locales and path.
  3. Translate strings — Use .tr() extension on keys (e.g., 'welcome'.tr()). For dynamic text, use 'welcome_user'.tr(namedArgs: {'name': 'John'}) with a {name} placeholder, or pass positional args:.
  4. Switch locale — Change via context.setLocale(Locale('vi')).
  5. Handle plurals — Use plural() for quantity-dependent strings, such as item_count or cart keys.
  6. Sync translations — Use sheet_loader_localization to auto-generate CSV/JSON from Google Sheets.

Bootstrap & Usage Examples

See implementation examples for bootstrap setup and translation usage patterns.

Anti-Patterns

  • No Hardcoded Strings: Always use translation keys from assets
  • No Manual Localization Calls: Use easy_localization .tr() extension
  • No Mismatched Keys: Ensure keys identical across all locale-specific files

Reference & Examples

For setup and Google Sheets automation: See references/REFERENCE.md.

Related Topics

idiomatic-flutter | widgets

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