I like, and the appearence of terquoise plastic always makes my heart skip a beet
LIke the overall feel, though the top feels a bit empty, which could be a good thing, depends on how you use the space in the other areas of the site.
The base navigation is nice, like the way the whole bar highlights. I agree with Mik there, maybe each different bar could highlight a different colour/shade of the same colour.
I don't see that the languages are obscure. No matter what language you translate to it'll increace your audience + show an extra talent (I'm guessing you speak these languages). I think it may need to be a bit more obvious though, or pointed out at an intro stage/on the first page.