What this app does is very simple, give you the ability to chat with anyone around the world speaking any language. You don't have to learn any new language. Rather, this app will translate anything to your native language that you understand.
Not only text chat, It works for voice chat too! It will recognize what your chat partner trying to say, translate that to your native language and play it to you in your native language in robotic voice. Thus, you can have instant text/voice conversation without worrying what other party's native language is.
Though its currently in web application shape, I am intend to make it a mobile app too, which should have more realistic use cases, I guess.