From TJ-HD Software:
Most applications on your Mac have several language options built in. But you don't normally get the opportunity to use them, without changing your system language. Language Switcher changes all that. It enables you to open applications in other languages - instantly. It shows you what language options are available for every single application on your Mac, and lets you choose the one you want to use, without changing anything else. So whether you're learning a language, or fluent in several, you can now immerse yourself in the language on your screen. Open your favourite apps in French, for example, just like the French in Paris. Or keep most apps in English, and immerse yourself in Spanish when instant messaging. It works with every application, from Apple and from third party developers. And it's very flexible. You can switch the language on just one app, or as many apps as you like. You can even use several languages at the same time, for different applications. And it doesn't change anything permanently. When you quit your app, it opens next time in your default language. Language Switcher unlocks the languages that are already on your Mac. It's that simple.