Alright, time to show off *cracks knuckles* (also I'm interested in boosting response to this thread: nice to see what people are learning/comfortable with).
Main Language: Java
Secondary Language: C#
Other known languages: Prolog, C, C++, Python, Ruby, HTML, CSS, JavaScript, Basic, Visual Studio languages.
Learning: PHP, Lua.
So my main language is what I use for my degree (and my dissertation), my secondary language is the one I use for games development in Unity, and the other languages are ones I've picked up along the way.