Monolingual for Mac

Snapshot: reclaim disk space by removing unused language files

Language resource files for OS X can consume gigabytes of storage—far more than most users need. Monolingual is a small utility that removes extra localization data from your Mac quickly, helping recover disk space. Use it carefully: removing the wrong files can cause applications or the system itself to malfunction.

When you should be cautious

• Some programs expect access to non-English resources even if you never use those languages.
• Never delete English language files; removing them may prevent OS X from starting or functioning correctly.
• Only remove languages you are certain you will never need, and consider keeping a backup before making major changes.

What Monolingual can remove

Monolingual lets you pick which types of localization-related files to strip from your drive. You can enable or disable removals for:

• Architectures (binary slices for other CPU types)
• Input methods and keyboard layouts
• Language bundle files and localization resources

How the interface works

The app presents a straightforward set of toggles: choose the languages and resource categories to keep or delete, then run the cleanup. The process is fast and typically completes in seconds, though the exact time depends on how much data is removed.

Practical tips

• Double-check selections before proceeding.
• Back up critical data or create a system snapshot to allow recovery if something stops working.
• If an app misbehaves after cleaning, reinstalling that app often restores its needed language files.

Release note

Resolved an upgrade problem affecting users migrating from Monolingual versions 1.5.0 or 1.5.1.