Adult Friend Finder is the first one that comes to mind. They serve a bunch of languages (no Russian or Polish), and have special sites for Japanese, Korean, French and Spanish.
I do well with them on ascii; idn not so well. Especially with Korean and Japanese.
My Greek is doing ok even though Greek is not a supported language, but I have some killer keywords on Greek, plus, I send the traffic to a doorway before sending them off to AFF, so they're filtered through.
So here you go:
http://adultfriendfinder.com/go/g247277-brk
>gratuitous affiliate code included so I can buy myself a beer when you make it big
