I get the feeling that the majority of the people here are from the states, however would anybody know how many users in percent are from EU countries?
A majority of our members are from the states I believe, however a significant percentage of Elliquiy's members come from the rest of the world, including EU countries. The only person who might have access to that kind of statistical data would be the site owner, and I can't guarantee that he'd have those numbers available. Unless I've completely missed that information on the site stats page of course, which is possible.
I there also an RP comunity inspired by World of Warcraft fandom?
We don't have a specific community or area for any fandom, but we do have members who RP in that fandom on occasion.