I speak Swedish and English fluently, Swedish being my native language. I took French classes for four years but didn't get very much out of it. Norwegian isn't very different from Swedish, so it's pretty easy to understand. Danish, on the other hand... I can read it fairly well, but I can almost never hear what they're saying.

Outside that, I have a pretty good sense of linguistics, so I can often navigate myself through some phrases from most Indo-European languages by analyzing them word by word. For that reason and others, I would like to learn Latin or Spanish, both being so largely connected to a barrage of languages.