Google offers translation services but Eduardo was reiterating your interest if that helps. Roll20 are unlikely to want to discuss licencing of content on the forums and have started to drive user interaction through the help desk these days but I'd say your best way of encouraging content to be available on Roll20 is to reach out to the publishers of said content and point them towards Roll20 as a potential market/partner. The ball is really in their court in my opinion :) Good luck if you choose to, it does look like a great product that I'd definitely look into using if it were available!