Well, since my husband of 31 years is German and we've been living in Germany for almost that long, I'd be in a real fix if I didn't speak the language.
My language is Icelandic. I also speek English, German, Danish, quite some Norwegian, some Swedish and Faroe Island language and a little French and understand some in some other languages, like Spanish, Italian, Dutch, Belgian... Oh, and I used to speak a tiny little bit in Mandarin, most of it is forgotten though...someday I will refresh what I had learned.