Any polyglots in these here parts?

I was just wondering if anyone here is multilingual. Personally, I have a passion (and luckily, an aptitude) for learning languages. I fluently speak English, French and Italian, and though I’m a little rusty, my Spanish is just about up to that level also. I know a little Japanese as well, and studied Latin for 2 years.

Which languages can you speak? How proficient are you? How did you learn these languages?