I am fluent in my native language, which is Hebrew, and my second language, which is English. I used to be able to understand French and Arabic quite well, though I cannot speak them (I can immitate, though! ) and now I've lost that talent almost completely, as I haven't practiced any of them lately. I can make sense of just about any Latin-based or Latin-inspired modern language, which makes up for most European languages except Nordic ones. Those are freaking hard.

Also, as a proud member of my country, I can swear very fluently in Hebrew, Arabic, English, Russian, German, Yiddish, Ladino, Spanish, and probably a few others I've forgotten. It makes for long, nasty chains of curse-words.