American English (Minnesotan dialect) is my native language, hablo español bastante para hacerme entender.
I know a smidge of German from my late grandmother, a small bit of crude language in Klingon, French, Japanese, and Cybertronian.
I also know 'Dojang Korean' from taking Kyukido classes. Komapsumnida.
I want to learn Hebrew, because I'm a stubborn git, and some useful language via Rosetta Stone.
Haven't made up my mind what one though...
Edit: Perhaps Arabic. The written form is gorgeous, and the people are lovely.
I can carry on a basic conversation and swear like a sailor in Canadian French (slightly different dialect then parisian french). I'm in the process of learning Korean.
I can also more or less understand what people are saying in ASL (sign language) because there used to be school for the deaf in the city I used to live & I would ride the same city-bus as a group of them. I would always try to try to figure out what they're saying. I can't speak it though. (I'm just a horrible person for eavesdropping lol) The funniest thing in the world is seeing two deaf people having a heated argument, rather than shout over each other, they close their eyes & cross their arms.