Flutter Supported Locales: Complete List of Languages 2025

Flutter's localization system supports 80+ locales out of the box through the flutter_localizations package. Here's the complete reference guide to every supported locale, including language codes, script variants, and RTL support.

🔎 Prefer to search and copy? The free Flutter Locale Explorer lets you filter all supported locales, see native names and RTL flags, and copy Locale() and supportedLocales code with one click.

Quick Reference: Most Common Locales

Language	Locale Code	RTL	Notes
English (US)	en or en_US	No	Default in most apps
English (UK)	en_GB	No	Different date formats
Spanish	es	No	500M+ speakers
French	fr	No	Used in 29 countries
German	de	No	Longer text, plan for expansion
Chinese (Simplified)	zh or zh_CN	No	1.1B+ speakers
Chinese (Traditional)	zh_TW	No	Taiwan, Hong Kong
Japanese	ja	No	Character-based
Korean	ko	No	Character-based
Arabic	ar	Yes	RTL, 400M+ speakers
Hindi	hi	No	600M+ speakers
Portuguese (Brazil)	pt_BR	No	200M+ speakers
Russian	ru	No	Cyrillic script

Complete List of Supported Locales

A

Language	Code	Country Variant	RTL
Afrikaans	af	South Africa	No
Albanian	sq	Albania	No
Amharic	am	Ethiopia	No
Arabic	ar	Multiple	Yes
Arabic (Egypt)	ar_EG	Egypt	Yes
Arabic (Saudi)	ar_SA	Saudi Arabia	Yes
Armenian	hy	Armenia	No
Assamese	as	India	No
Azerbaijani	az	Azerbaijan	No

B

Language	Code	Country Variant	RTL
Basque	eu	Spain	No
Belarusian	be	Belarus	No
Bengali	bn	Bangladesh/India	No
Bosnian	bs	Bosnia	No
Bulgarian	bg	Bulgaria	No
Burmese	my	Myanmar	No

C

Language	Code	Country Variant	RTL
Catalan	ca	Spain	No
Chinese (Simplified)	zh	China	No
Chinese (Traditional)	zh_TW	Taiwan	No
Chinese (Hong Kong)	zh_HK	Hong Kong	No
Croatian	hr	Croatia	No
Czech	cs	Czech Republic	No

D

Language	Code	Country Variant	RTL
Danish	da	Denmark	No
Dutch	nl	Netherlands	No
Dutch (Belgium)	nl_BE	Belgium	No

E

Language	Code	Country Variant	RTL
English	en	US (default)	No
English (Australia)	en_AU	Australia	No
English (Canada)	en_CA	Canada	No
English (UK)	en_GB	United Kingdom	No
English (India)	en_IN	India	No
English (Ireland)	en_IE	Ireland	No
English (New Zealand)	en_NZ	New Zealand	No
English (Singapore)	en_SG	Singapore	No
English (South Africa)	en_ZA	South Africa	No
Estonian	et	Estonia	No

F

Language	Code	Country Variant	RTL
Filipino	fil	Philippines	No
Finnish	fi	Finland	No
French	fr	France	No
French (Belgium)	fr_BE	Belgium	No
French (Canada)	fr_CA	Canada	No
French (Switzerland)	fr_CH	Switzerland	No

G

Language	Code	Country Variant	RTL
Galician	gl	Spain	No
Georgian	ka	Georgia	No
German	de	Germany	No
German (Austria)	de_AT	Austria	No
German (Switzerland)	de_CH	Switzerland	No
Greek	el	Greece	No
Gujarati	gu	India	No

H

Language	Code	Country Variant	RTL
Hebrew	he	Israel	Yes
Hindi	hi	India	No
Hungarian	hu	Hungary	No

I

Language	Code	Country Variant	RTL
Icelandic	is	Iceland	No
Indonesian	id	Indonesia	No
Italian	it	Italy	No

J

Language	Code	Country Variant	RTL
Japanese	ja	Japan	No

K

Language	Code	Country Variant	RTL
Kannada	kn	India	No
Kazakh	kk	Kazakhstan	No
Khmer	km	Cambodia	No
Korean	ko	South Korea	No
Kyrgyz	ky	Kyrgyzstan	No

L

Language	Code	Country Variant	RTL
Lao	lo	Laos	No
Latvian	lv	Latvia	No
Lithuanian	lt	Lithuania	No

M

Language	Code	Country Variant	RTL
Macedonian	mk	North Macedonia	No
Malay	ms	Malaysia	No
Malayalam	ml	India	No
Marathi	mr	India	No
Mongolian	mn	Mongolia	No

N

Language	Code	Country Variant	RTL
Nepali	ne	Nepal	No
Norwegian (Bokmål)	nb	Norway	No
Norwegian (Nynorsk)	nn	Norway	No

O

Language	Code	Country Variant	RTL
Oriya	or	India	No

P

Language	Code	Country Variant	RTL
Pashto	ps	Afghanistan	Yes
Persian (Farsi)	fa	Iran	Yes
Polish	pl	Poland	No
Portuguese	pt	Portugal	No
Portuguese (Brazil)	pt_BR	Brazil	No
Punjabi	pa	India/Pakistan	No

R

Language	Code	Country Variant	RTL
Romanian	ro	Romania	No
Russian	ru	Russia	No

S

Language	Code	Country Variant	RTL
Serbian	sr	Serbia	No
Serbian (Latin)	sr_Latn	Serbia	No
Sinhala	si	Sri Lanka	No
Slovak	sk	Slovakia	No
Slovenian	sl	Slovenia	No
Spanish	es	Spain	No
Spanish (Latin America)	es_419	Latin America	No
Spanish (Mexico)	es_MX	Mexico	No
Spanish (US)	es_US	United States	No
Swahili	sw	East Africa	No
Swedish	sv	Sweden	No

T

Language	Code	Country Variant	RTL
Tamil	ta	India/Sri Lanka	No
Telugu	te	India	No
Thai	th	Thailand	No
Turkish	tr	Turkey	No

U

Language	Code	Country Variant	RTL
Ukrainian	uk	Ukraine	No
Urdu	ur	Pakistan	Yes
Uzbek	uz	Uzbekistan	No

V

Language	Code	Country Variant	RTL
Vietnamese	vi	Vietnam	No

Z

Language	Code	Country Variant	RTL
Zulu	zu	South Africa	No

Implementing Supported Locales

Basic Setup

import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

MaterialApp(
  localizationsDelegates: [
    AppLocalizations.delegate,
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate,
    GlobalCupertinoLocalizations.delegate,
  ],
  supportedLocales: [
    Locale('en'),      // English
    Locale('es'),      // Spanish
    Locale('fr'),      // French
    Locale('de'),      // German
    Locale('zh'),      // Chinese (Simplified)
    Locale('ja'),      // Japanese
    Locale('ar'),      // Arabic (RTL)
    Locale('he'),      // Hebrew (RTL)
  ],
  home: MyHomePage(),
)

With Country Codes

supportedLocales: [
  Locale('en', 'US'),     // English (US)
  Locale('en', 'GB'),     // English (UK)
  Locale('pt', 'BR'),     // Portuguese (Brazil)
  Locale('pt', 'PT'),     // Portuguese (Portugal)
  Locale('zh', 'CN'),     // Chinese (Simplified)
  Locale('zh', 'TW'),     // Chinese (Traditional)
]

With Script Codes

supportedLocales: [
  Locale.fromSubtags(languageCode: 'zh', scriptCode: 'Hans'), // Simplified
  Locale.fromSubtags(languageCode: 'zh', scriptCode: 'Hant'), // Traditional
  Locale.fromSubtags(languageCode: 'sr', scriptCode: 'Latn'), // Serbian Latin
  Locale.fromSubtags(languageCode: 'sr', scriptCode: 'Cyrl'), // Serbian Cyrillic
]

RTL Language Support

Detecting RTL

bool isRtl(BuildContext context) {
  return Directionality.of(context) == TextDirection.rtl;
}

Manual RTL Check

const rtlLanguages = ['ar', 'he', 'fa', 'ur', 'ps'];

bool isRtlLocale(Locale locale) {
  return rtlLanguages.contains(locale.languageCode);
}

RTL-Aware Widget

Widget buildDirectionalWidget(BuildContext context) {
  final isRtl = Directionality.of(context) == TextDirection.rtl;

  return Padding(
    padding: EdgeInsetsDirectional.only(
      start: 16,  // Left in LTR, Right in RTL
      end: 8,     // Right in LTR, Left in RTL
    ),
    child: Row(
      children: [
        Icon(isRtl ? Icons.arrow_back : Icons.arrow_forward),
        Text('Navigate'),
      ],
    ),
  );
}

Locale Resolution

How Flutter Chooses a Locale

1. Exact match: en_US device → en_US supported
2. Language match: en_US device → en supported
3. Country match: (rarely used)
4. First supported: Fallback to first in list

Custom Resolution

MaterialApp(
  localeResolutionCallback: (deviceLocale, supportedLocales) {
    // Try exact match
    for (var locale in supportedLocales) {
      if (locale == deviceLocale) return locale;
    }

    // Try language match
    for (var locale in supportedLocales) {
      if (locale.languageCode == deviceLocale?.languageCode) {
        return locale;
      }
    }

    // Fallback to English or first supported
    return supportedLocales.firstWhere(
      (l) => l.languageCode == 'en',
      orElse: () => supportedLocales.first,
    );
  },
)

Checking Available Material Localizations

import 'package:flutter_localizations/flutter_localizations.dart';

void printMaterialLocales() {
  final locales = GlobalMaterialLocalizations.delegate.supportedLocales;

  for (var locale in locales) {
    print('${locale.languageCode}_${locale.countryCode ?? ""}');
  }
}

Adding a New Locale to Your App

Step 1: Create ARB File

# Create French ARB
touch lib/l10n/app_fr.arb

Step 2: Add Translations

{
  "@@locale": "fr",
  "appTitle": "Mon Application",
  "@appTitle": {
    "description": "Titre de l'application"
  }
}

Step 3: Regenerate

flutter gen-l10n

Step 4: Verify Support

// AppLocalizations.supportedLocales now includes French
print(AppLocalizations.supportedLocales);
// [Locale('en'), Locale('fr'), ...]

Market Priority by Language

Planning which languages to add? Here's a priority guide:

Tier 1: Global Reach (Essential)

• English (en) - 1.5B speakers
• Spanish (es) - 550M speakers
• Chinese (zh) - 1.1B speakers
• Hindi (hi) - 600M speakers
• Arabic (ar) - 400M speakers

Tier 2: High Value Markets

• French (fr) - 280M speakers
• German (de) - 130M speakers
• Japanese (ja) - 125M speakers
• Portuguese (pt_BR) - 220M speakers
• Russian (ru) - 250M speakers

Tier 3: Growing Markets

• Korean (ko) - 80M speakers
• Italian (it) - 65M speakers
• Turkish (tr) - 80M speakers
• Vietnamese (vi) - 85M speakers
• Indonesian (id) - 200M speakers

FlutterLocalisation: Add Languages Instantly

Translating to 80+ languages manually is overwhelming. FlutterLocalisation helps:

• ✅ AI translation to any supported locale
• ✅ Visual editor for all languages side-by-side
• ✅ Export ARB files ready for Flutter
• ✅ Placeholder validation across all locales
• ✅ Missing translation detection

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