Wrap Flutter widgets for gen-l10n automatically

Flutter's official i18n is flutter gen-l10n: ARB catalogs in, generated AppLocalizations getters out. Polyglot automates the part the toolchain doesn't — finding your hardcoded strings and converting them.

The transformation

import 'package:flutter/material.dart';

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Text("Welcome back");
  }
}

import 'package:flutter/material.dart';
import 'package:demo_app/l10n/app_localizations.dart';

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Text(AppLocalizations.of(context)!.welcome_back);
  }
}

• The whole string literal is replaced with the getter — never a partial splice inside Dart interpolation.
• const contexts are respected: a const Text(...) can't hold a runtime lookup, so those strings are skipped with a reason rather than broken.
• The AppLocalizations import is added per file, and resolves via your l10n.yaml — which Polyglot scaffolds if missing.

ARB catalogs, merged

{
  "@@locale": "en",
  "welcome_back": "Welcome back"
}

{
  "@@locale": "de",
  "@welcome_back": {
    "description": ""
  },
  "welcome_back": "Willkommen zurück"
}

{
  "@@locale": "fr",
  "@welcome_back": {
    "description": ""
  },
  "welcome_back": "Bon retour"
}

Existing ARB entries are read and preserved; keys are flat identifiers exactly as gen-l10n requires, so the generated getters always match the wrapped call sites.

Try it

$ curl -fsSL https://getpolyglot.ai/install.sh | sh
$ polyglot init --framework flutter
$ polyglot scan
$ polyglot wrap
$ polyglot translate --languages de   # 50 strings free, no signup