I listen to lots of different languages too~
English, Japanese, Chinese (mandarin only

), French, Romanian, Russian, Bulgarian, Swedish, etc~
There's nothing wrong with listening to other language songs...in fact, I think it should be encouraged.
Honestly though, when people hear that I listen to anything other than Chinese (native tongue) or English, they say something like, "Omg what/?!!, why would you do that? Do you even UNDERSTAND what they're singing??!!!!"
And it pisses me off because that's not the reason why I listen to music...if It sounds good I'll listen to it. yeesh~
But then I have a friend who listens to Chinese songs and she's Vietnamese.
There's nothing wrong with it and I don't have a problem with it, but she's made to be a hypocrit.
SHe's one of the people similar to those who've asked me if I even understand the language, and yet when I told her that I was singing to some song no in english/chinese, she basically called me an idiot and said that I'm "not allowed to do that unless I know the language" which is so ****** up because..
k sorry ^^;
If you only listen to one or two languages, I think you're missing out~