Music is music to me. Im not into lyrics that much anyway. There's no denying a great song with good lyrics but a language barrier has never stopped me from enjoying good music, no matter where it comes from. Sometimes you can feel a song's intent through the performance even if you can't understand the words. One of my favorites is Youssou N'dor from Senegal who has worked with Peter Gabriel. He sings in his native language, mbalax and french. Also Israeli pop singer, Noa who sings in her native language, yemenite hebrew as well as arabic, french, spanish, italian, thai and english.

Sigur Ros, can't understand a word but I love them.

If we are only talking about the music here, I admit I would like to listen to the music from any part of the world. But when it comes to the lyrics, I would certainly not waste my time to listen a song in any weird unknown language.

Actually you don't have to translate anything. Translations are already made. They are on the Internet, available for anyone who wants to have a look.

To bother to consult them or not, depends on several things (music genre, personal tastes, band or singer's features, etc.). Sometimes the strong point of a band or a singer are lyrics. Sometimes just the sound. Sometimes both things. But if I find out that certain artist I like stands out for his lyrics, I personally don't mind taking two minutes to read a translation. Unfortunately I don't have those paranormal abilities to grasp the "essences" of a song that some people seem to own. :(


*EDIT. To clarify my own ideas I've decided to put an example from a specially talented singer-songwriter. That is, one of those cases in which knowing the lyrics could be interesting for a music lover. Extract from Ne me quite pas (Jacques Brel):

I listen to Iranian music, and I can only understand a little of it, but I really like it. Although lyrics are important, it won't put me off if I don't understand them.

Alright, I'm very strange when it comes to this.

I listen to a lot of metal where I've got absolutely no idea what is being said and most of the time don't care because lets face it [most] metal isn't known for its strong lyrics. With that being said, if I'm listening to something with clean vocals I want to be able to understand what the person is saying. Sadly, I'm normally turned off by really strange [strange to my ears anyway, lol] foreign accents.

Overall though, yes and no. It really just depends. I'm one of those people that when I'm alone listening to things I like to mouth the words and such so I like understanding them.

Yeah, I love Vocaloid! It's in Japanese.

I like Sigor Ros very much - and I don't think anyone understands their lyrics...

Lyrics aren't always that important for me anyway so it doesn't matter if I understand them or not. It's more about the tone of the voice and how it fits with the music. Also Im really into instrumental music so no lyrics there either.
Besides Sigur Rós which everyone seems to love (rightfully so since they are just amazing.) I love this german band called Empyrium. Their last album was completely in german. I understand some german but not that much and I still enjoy this album immensly.

I really don't mind listening to music I don't understand as long as the beat and blend are great.