How many languages do you know? Can you read it? Understand it? Write it?
Personally, I can speak US English fluently, as well as read, write, and understand it. I can also undertand Hebrew, Yiddish, and Aramaic. I took a class in Spanish, but I don't really remember very much. The reason why I know these languages are, English, because I'm US born. Hebrew, because the Bible and most Jewish works are in Hebrew. Yiddish, because many people in my community speak it, and there are speeches and songs in it. Aramaic, because the Talmud is written in it (though with Hebrew letters).
IIRC, my barber speaks somwhere between eight and ten languages. Growing up in old Europe does that to you. I know some people from Latvia. Being Russian born, they needed to know Russian to speak in schools, and Latvian which was spoken at home. It's interesting to know why people use which language, and it's funny hearing them switch in a single conversation, without even realizing it. I have a friend that switches in between English and Ivrit (Modern Hebrew) when talking to his parents. It's rather entertaining.
This is different than computer languages. With computer languages, you know how to program, and the language is more like a tool. The idea is still mostly the same, it's just another way of doing it. With spoken languages everything changes. The language is more than a tool, it is a methodology of thought and life. Or so I think. How about you?