Seconded.BJ777 said:Japanese.
Why? Because it's awesome.
A bit of both, I'd like to fully learn French (because I sucked at French in school) and PolishActivatorX said:If by "learn", you mean the basics of a language, then Japanese, Chinese and Arab.
If by "learn", you mean to fully understand the language and the ability to converse with other people in that language, then I'd go with Russian, Polish, Finnish and Swedish.