Least metal language in the world?

The lyrics booklet to a sign language album would just piss me off..
 
Latin is the powergod of metal.

You have any idea how ominous that shit sounds?

However, I've never heard good Wapanese metal.

I bet out there somewhere someone has metalized Gregorian Chants!

Hmmm if I were to think of a language that I don't think is metal I'd say Thai!