Monolingual is a program for removing unnecessary language resources from Mac OS X.

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User Reviews

  • Been using Monolingual for a long time and love its function. Am currently using version 1.7.2 on Mac OS X 10.11.2. However, since installing the 10.11.2 update to OS X Monolingual is no longer erasing the non-english lproj files in any of the Apps written by Apple. I haven't checked every app but App Store, Time Machine, Automator, Calculator, Calenday, Chess, Contacts and the others that I have checked all still have all of the non-english lproj files within the apps resources folder. It did clean the foreign languages out of non-Apple apps. Have run Monolingual several times and rebooted the machines but still those files exist. I hope that Apple has not taken security to the point to where Monolingual can no longer be used effectively.

  • Great program, simple, unobtrusive, does what it has to do very well, I recommended it to a lot of people. Now beta testing on el Capitan, in one installation it is working normally, the other I have to check.

  • GateKeeper prevents v1.5.10 from luanching, saying it's "damaged". Seems to be an issue with the codesign, which tests valid for me, but won't get by GateKeeper. Updates using the Sparkle framework work fine.

  • Hi, I have an iMac OSX Intel 10.9.2 and my Monolingual version (1.5.10) doesn't work. I choose the languages I want to eliminate, press "delete" and nothing happens. ¿May somebody help me? Thanks, regards and good life,

  • Excellent work team Monolingual!

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Additional Project Details


French, Polish, Italian, English, Swedish, German, Japanese

Intended Audience

End Users/Desktop

User Interface

Cocoa (MacOS X)

Programming Language

C, Objective C