The non-english songs I listen to are mostly japanese or spanish.
Miyavi is my favorite japanese artist. From Spain I like Mago De Oz.

yes. easy.

some of my favourite bands are japanese.
one being: "High and Mighty Color".

I listen to music in other languages, I remember reading somewhere that Azam Ali learned to sing in 'nonsense' words that have an exotic flavor to them, I thought that was pretty cool.

i listen to old falco songs sung in german

I'm not opposed to the idea of listening to music in a language that I don't understand. Albeit my only divergence into it thus far would be some Spanish and French rap that I've heard here and there. I like to hold on to the idea that music can be a universal language, embraced and enjoyed by everyone.

I listen to Magma and have no problem with it. Then again, who listens to prog for the singing anyway?

Yes, if it sounds good, why not? It's not all about identifying with the lyrics.

sure

it sounds exotic

you can't get really get more aggressive than German or Japanese because it's very guttural

and Arabic music sound like Quranic prayers set to music

Whoever says no to this question needs to listen to Sigurd Ros "Takk..."

I try to get a couple of foreign albums in every batch of downloads I do. Ultimately it's about how good the music is, but I also find that different languages really change the vocals (outside of mere comprehension of lyrics). I do prefer some languages over others.