I'm in the only german linkshell on my server and about 80% of the members cannot understand english or japanese. These 15 active players are not able play with NA/JP players because of the language barrier.
How the hell are they supposed to have fun in this game?

This is one of the reasons why World of Warcraft is so popular.
A player doesn't need to learn multiple languages. He just starts the game and plays with his fellow players who are from the same country and speak the same language. THIS makes things so much easier to communicate AND find partys.

Do you REALLY think >NEW< players who never ever played an MMO before (or maybe only WoW for example), are gonna have fun in a game where you cannot understand anybody?

I don't think even gamescom could've saved this game for the german market. Long live World of Warcraft and its regional servers.