Flutter

Flutter localization

Flutter is Google’s open-source UI framework for building natively compiled apps for mobile, web, and desktop from a single codebase. It handles internationalization through ARB (Application Resource Bundle) files, a JSON-based format with metadata for context, placeholders, and plurals. Translate your Flutter ARB files with Localazy and keep every platform build multilingual from one project.

How Localazy works with Flutter

Upload your ARB files through the Localazy CLI, translate on the platform, and download translated files back into lib/l10n/, ready for flutter gen-l10n, with no changes to your app code.

• Complete ARB support - metadata blocks, placeholders, and ICU messages parsed correctly, no extra configuration needed.
• Translator context - @ metadata and description fields shown in the translation UI, so translators see what each string does.
• Array notation - bracketed arrays (difficulty[0], difficulty[1]) supported via the array_br feature.
• CI/CD automation - run localazy upload and localazy download from GitHub, GitLab, or Bitbucket pipelines.

Helpful Localazy features for Flutter translation

Placeholder and ICU validation

Machine translation and busy translators break {count, plural, …} syntax more often than you’d expect, and a single malformed message fails flutter gen-l10n for the whole locale. Localazy validates placeholders and ICU syntax during translation, so errors are caught in the editor instead of your build log.

Format conversions

Sharing strings between your Flutter app and something else? Upload ARB and download the same translations as Android XML, iOS .strings, PO, or XLIFF: one source of truth for every platform.