This isn't a matter of languages - kingdoms main language is english, and I think everyone playing it can at least get their point across (by means of sign-language, at least). Besides, I always hope that my english is good enough for everyone
Chris, you're certainly right, there are ways for the evil EM to harm graal, but not as bad as someone with add/remove-rights or worse can. Giving out prices to friends is an issue, but this could be kept at bay. The main problem I see is: what happens if a friends wins a competition that is won without spectators (trivia, treasurehunt etc)? I think an event mode would be good, meaning the EM can only give away items with a certain flag when he is in this mode, and while he is, every such item he hands out is displayed to everyone on the server, so at least everyone will know whether the right person got the right prize - and what prize it was. I have no idea whether it is possible to implement that...
Till then, all we can do is rely on the present EMs to be trustworthy and the events to improve in some ways - and maybe give more EMs a try - with 'low' prizes at first.