Yes, I've added language packs to the app
You will find a new folder off the executable's path - LanguagePacks. Inside that folder is where all the folders for all the different languages reside (currently only English). Now here's the neat thing about this - you can define what you want to call the language by creating a new folder when the name of the language - i.e. If you wanted to create a French language you could create a folder called French. Inside that folder needs to be one file - languagepack.txt. This single txt file is what defines all the strings needed by the app.
When the app first starts up and you have never defined the language you will see the dialog box asking you to select a language (one caveat to this - if only one language is defined then the app will select it by default and you won't see this dialog box).
At any time you can change the language in real-time by clicking Edit-->Options-->Select language
