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i18n Guides

Step-by-step internationalization tutorials for every framework, platform, and workflow.

Web Frameworks

React (react-i18next)

i18n with react-i18next

Next.js (next-intl)

i18n with next-intl and App Router

React (react-intl)

i18n with FormatJS

Angular (Transloco)

i18n with Transloco

SvelteKit

i18n with svelte-i18n

Vue.js (vue-i18n)

i18n with vue-i18n and Composition API

Mobile & Cross-Platform

iOS

Xcode, SwiftUI, .strings

Android

Kotlin, strings.xml

Flutter

easy_localization, ARB files

Kotlin Multiplatform

Shared localization across platforms

Backend Frameworks

Django

gettext, PO files

Spring Boot

MessageSource, properties files

Flask

Flask-Babel, gettext

Go

go-i18n, message files

ASP.NET Core

IStringLocalizer, RESX files

Python

python-i18n, JSON/YAML

Laravel

__(), trans(), PHP/JSON locale files

Ruby on Rails

YAML files, t() helper, pluralization

Game Engines

Godot

TranslationServer, CSV/PO

Unreal Engine

FText, Localization Dashboard

Developer Tools

i18n Validator

Lint translation files for errors

i18n Converter

Convert between 32+ formats

Pseudo-Translation

Test i18n UI before launch

i18n AI Skills

AI commands for auditing & wrapping

Workflows

Continuous Localization

CI/CD automation for translations

CI Translation Validation

Automate i18n checks in your CI/CD pipeline

Translation File Sync

Keep i18n keys in sync across locales

Concepts

Locale Fallback Chains

Configurable fallback chains for 17+ frameworks

CLDR Plural Rules

Validate plural categories across languages

Testing

Pseudo-Localization

Test i18n readiness without real translations

Text Expansion Testing

Prevent layout breakage from translation length