Complete guide for internationalizing Flutter apps with gen-l10n, intl package, and custom approaches.
Works with
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
AI-first code editor with Composer
Before installing skills in Cursor, ensure your development environment meets these requirements:
node --versionflutter-internationalizationExecute the skills CLI command in your project's root directory to begin installation:
Fetches flutter-internationalization from madteacher/mad-agents-skills and configures it for Cursor.
The CLI shows a list of agents. Use arrow keys and space to select Cursor:
Confirm successful installation by checking the skill directory location:
Restart Cursor to activate flutter-internationalization. Access via /flutter-internationalization in your agent's command palette.
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
Skills execute code in your environment. Always review source, verify the publisher, and test in isolation before production.
Submit your Claude Code skill and start earning
Create detailed user stories, acceptance criteria, and feature specs
Example
Generate user stories for 'password reset feature' with acceptance criteria, edge cases, and test scenarios
Reduce spec writing time by 50%, ensure comprehensive coverage
Research competitors, compare features, identify gaps
Example
Analyze 5 competitor products, create feature comparison matrix, suggest differentiation opportunities
Complete competitive research in 2 hours instead of 2 days
Evaluate features using frameworks (RICE, ICE, Kano) and create prioritized backlogs
Example
Score 20 feature ideas using RICE framework, generate prioritized roadmap with rationale
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Comprehensive guide for adding internationalization (i18n) to Flutter applications. Covers setup, configuration, message management, number/date formatting, and advanced topics like locale override and custom language support.
Choose approach based on app needs:
gen-l10n (Recommended) - Modern, automated, code generation
intl package - Manual control, code-based
Intl.message() code, manual translation filesManual/Custom - Maximum flexibility
Update pubspec.yaml:
dependencies:
flutter:
sdk: flutter
flutter_localizations:
sdk: flutter
intl: any
Run:
flutter pub add flutter_localizations --sdk=flutter
flutter pub add intl:any
Add to pubspec.yaml:
flutter:
generate: true
Create l10n.yaml in project root:
arb-dir: lib/l10n
template-arb-file: app_en.arb
output-localization-file: app_localizations.dart
For advanced options, see l10n-config.md.
Create directory lib/l10n/.
Template file lib/l10n/app_en.arb:
{
"helloWorld": "Hello World!",
"@helloWorld": {
"description": "Greeting message"
}
}
Translation file lib/l10n/app_es.arb:
{
"helloWorld": "¡Hola Mundo!"
}
For complete ARB format, see arb-format.md.
Run:
flutter gen-l10n
Or run app to trigger auto-generation:
flutter run
Import and setup:
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'l10n/app_localizations.dart';
MaterialApp(
localizationsDelegates: [
AppLocalizations.delegate,
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
GlobalCupertinoLocalizations.delegate,
],
supportedLocales: [
Locale('en'),
Locale('es'),
],
home: MyHomePage(),
)
Access in widgets:
Text(AppLocalizations.of(context)!.helloWorld)
No parameters:
{
"welcome": "Welcome to our app",
"@welcome": {
"description": "Welcome message"
}
}
With parameters:
{
"greeting": "Hello {userName}!",
"@greeting": {
"description": "Personalized greeting",
"placeholders": {
"userName": {
"type": "String",
"example": "Alice"
}
}
}
}
Use in code:
Text(AppLocalizations.of(context)!.greeting('Alice'))
Based on count:
{
"itemCount": "{count, plural, =0{No items} =1{1 item} other{{count} items}}",
"@itemCount": {
"placeholders": {
"count": {
"type": "int"
}
}
}
}
Use in code:
Text(AppLocalizations.of(context)!.itemCount(5))
Based on string value:
{
"pronoun": "{gender, select, male{he} female{she} other{they}}",
"@pronoun": {
"placeholders": {
"gender": {
"type": "String"
}
}
}
}
Use in code:
Text(AppLocalizations.of(context)!.pronoun('male'))
Format numbers automatically:
{
"price": "Price: {value}",
"@price": {
"placeholders": {
"value": {
"type": "int",
"format": "simpleCurrency"
}
}
}
}
Format options: compact, currency, simpleCurrency, decimalPattern, etc.
Format dates automatically:
{
"eventDate": "Event on {date}",
"@eventDate": {
"placeholders": {
"date": {
"type": "DateTime",
"format": "yMMMd"
}
}
}
}
Format options: yMd, yMMMd, yMMMMd, Hm, etc.
For complete formatting options, see number-date-formats.md.
Override locale for specific widgets:
Localizations.override(
context: context,
locale: const Locale('es'),
child: CalendarDatePicker(...),
)
For complex locales (Chinese, French regions):
supportedLocales: [
Locale.fromSubtags(languageCode: 'zh'),
Locale.fromSubtags(languageCode: 'zh', scriptCode: 'Hans'),
Locale.fromSubtags(languageCode: 'zh', scriptCode:<Make data-driven prioritization decisions faster
Draft PRDs, status updates, and stakeholder presentations
Example
Create executive summary of Q3 roadmap, monthly progress report, feature launch announcement
Save 3-5 hours/week on communication overhead
Prerequisites
Time Estimate
30-60 minutes to see productivity improvements
Steps
Common Pitfalls
✓ Do
✗ Don't
💡 Pro Tips
✓ Use when
Use for user story writing, competitive research, roadmap prioritization, stakeholder communication, and PRD drafting. Best for reducing repetitive documentation and research work.
✗ Avoid when
Avoid for strategic product vision (requires deep customer empathy), pricing decisions (needs market and financial expertise), or when face-to-face customer discovery is more valuable than speed.
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mattpocock/skills
parcadei/continuous-claude-v3
cursor/plugins
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pproenca/dot-skills
I recommend flutter-internationalization for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
Keeps context tight: flutter-internationalization is the kind of skill you can hand to a new teammate without a long onboarding doc.
Registry listing for flutter-internationalization matched our evaluation — installs cleanly and behaves as described in the markdown.
flutter-internationalization is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
flutter-internationalization reduced setup friction for our internal harness; good balance of opinion and flexibility.
Solid pick for teams standardizing on skills: flutter-internationalization is focused, and the summary matches what you get after install.
Solid pick for teams standardizing on skills: flutter-internationalization is focused, and the summary matches what you get after install.
We added flutter-internationalization from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
flutter-internationalization is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
We added flutter-internationalization from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
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