CheckLang 1.1

Review app translations and share feedback

CheckLang helps developers, translators, and localization teams deliver high-quality multilingual applications with confidence. Review translations side by side, identify missing or inconsistent text, and ensure every version of your app provides the same polished experience for users around the world.

Instead of manually browsing localization files, CheckLang presents every translatable string in a clear, searchable interface that simplifies proofreading and collaboration. Add comments, suggest improvements, compare languages, and export professional review reports that streamline communication between translators, QA teams, and developers.

Built natively for macOS, CheckLang delivers a fast, focused, and privacy-friendly workflow designed for real-world localization projects.

Download Download on the Mac App Store FREEWARE

Version 1.1 for Mac
Required: macOS 14 or a more recent version for the best experience.
Universal binary optimized for Intel and Apple Silicon processors. Verified and code-signed through Apple’s notarization service to ensure a safe and trusted app. Available in English only.

Support FREEWARE with a donation

FAQs Changelog

Main features

Review any Mac app
Open installed apps from your Applications folder without needing Xcode or project access
Automatic string discovery
Finds and loads localizable.strings files across all language folders in the app bundle
Source and translation side by side
Compare the original language with each localized version in one clear table
Inline suggestions and comments
Add better translations and notes directly in the review table
Powerful search
Search across keys, source text, translations, and your feedback with flexible scope options
Smart filters and sorting
Focus on missing strings, entries with suggestions, developer notes, and more
Export for developers
Share your review as CSV or PDF, including only changed items or the full string list
Recent apps and session memory
Quickly reopen apps you’ve reviewed and return to the last language you were working on
Add new languages
Submit new languages based on current versions in the app
Built for reviewers, not developers
A simple, sandboxed workflow designed for translators, QA teams, and native speakers