CheckLang 1.1

Review app translations and share feedback

CheckLang helps translators, QA reviewers, and localization teams review macOS app translations.

Pick any installed app from your Applications folder and CheckLang scans its localization files to show every string side by side with the original language. Browse languages in the sidebar, search and filter the list, and add your own suggestions and comments directly in the table. When you are done, export your feedback as CSV or PDF and send it to the developer team.

CheckLang is built for real-world localization review: it focuses on the standard Localizable.strings files used by most Mac apps, keeps your recent apps handy, and remembers where you left off. Whether you are proofreading a French release, checking missing translations, or collecting feedback from native speakers, CheckLang turns a scattered review into a clear, shareable report.

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Version 1.1.
Required: macOS 14 or later for the best experience.
Universal binary optimized for Intel and Apple Silicon processors. Notarized by Apple secure service to prevent malware. English version only.

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