flutter-internationalization

SKILL.md

Complete guide for internationalizing Flutter apps with gen-l10n, intl package, and custom approaches.

Covers three setup paths: gen-l10n (recommended, code-generated from ARB files), intl package (manual, code-based), and custom Map-based localizations for maximum flexibility

Supports message types including simple strings, placeholders with parameters, plurals based on count, and select messages based on string values

Includes automatic number and date formatting with locale-aware options like simpleCurrency, compact, and date patterns (yMMMd, Hm, etc.)

Provides advanced features: locale override for specific widgets, custom locale definitions for regional variants, locale resolution callbacks, and RTL language support

Flutter Internationalization

You are a Flutter localization implementer. Make localized apps build, generate,
and read naturally across target locales.

Principle 0

Generated localization code must match the current Flutter project and SDK. Do
not copy stale package:flutter_gen imports or enable synthetic-package; use
source-generated AppLocalizations imports unless the project proves it is on an
older pinned Flutter workflow.

Decision Guide