About inlang
inlang is an open-source globalization ecosystem that provides an open file format for localizing software (i18n). It enables developers, translators, and designers to collaborate on the same source using git as the single source of truth, eliminating hand-offs and context switching between teams.
Pros & Cons
Pros
- Fully open source with no vendor lock-in thanks to the open file format
- Seamless VS Code integration reduces context switching for developers
- Git-based workflow keeps localization data version-controlled alongside code
- Plugin system supports all major i18n formats (JSON, XLIFF, i18next, next-intl)
- Paraglide JS offers near-zero runtime overhead with full type safety
- Enables direct collaboration between developers, translators, and designers
Cons
- Ecosystem is still maturing compared to established TMS platforms like Crowdin or Lokalise
- Requires developer involvement to set up and configure plugins
- Limited out-of-the-box integrations with non-git-based translation workflows
- Documentation can be sparse for advanced use cases
Key Features
Open File Format
Universal .inlang file format that any tool can read and write, avoiding vendor lock-in to a single translation management system
CRUD API
Read and write translations programmatically with a full CRUD API that scales to millions of messages
SQL Queries
Query localization messages like a database using SQL-like syntax for powerful filtering and analysis
Plugin System
Import and export any format including JSON, XLIFF, i18next, next-intl, and more through an extensible plugin architecture
VS Code Extension
Visualize, edit, and lint translated strings directly in VS Code with inline decorations, hover support, and one-click string extraction
Paraglide JS
Fully typesafe i18n library that compiles away message formatting overhead for near-zero runtime cost
CI/CD Automation
Automate localization tasks in CI/CD pipelines with machine translation, validation, and quality checks
Git-Based Workflow
Uses your git repository as the single source of truth for all localization data, enabling version control and collaboration
Pricing
- Open file format & SDK
- VS Code extension
- Paraglide JS library
- CLI tools
- Plugin system
- Git-based workflow
- Community support
Best For
Web App Localization
Localize React, Svelte, or Next.js web applications with type-safe translations and near-zero runtime cost using Paraglide JS
Developer-Led i18n Workflows
Enable developers to manage translations directly in VS Code without switching to external translation management tools
Open Source Project Localization
Leverage the git-based workflow to allow community contributors to submit translations via pull requests
CI/CD Translation Automation
Automate translation validation, machine translation, and quality checks as part of your deployment pipeline
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