Whether you’re running a massive 500 GB hard drive or super-speedy 32 GB solid state drive on your Mac, it doesn’t hurt to strip away unnecessary languages from your programs. It’s a hassle to go through applications individually and remove additional language files, but Monolingual has automated this process in an easy to use, free utility.
All you’ve gotta do is download Monolingual, run it, select the “Languages” tab, and select the languages you want to delete. Keep in mind that this is a permanent thing. If you want to reinstall languages, you’ll have to reinstall the operating system entirely, so don’t accidentally delete your primary language. 😀
Depending on the size of your application library, this process can save gigabytes of space.