Probably has more to do with the fact that the DEVs are all Japanese, living in Japan, and speak Japanese. I can't imagine that the World of Warcraft or Guild Wars 2 team is constantly aware of every single little issue that comes from their non-English speaking communities. Between translation and compiling of requests, the infinite number of asinine and unproductive reports they likely get, and the countless hours of higher priority nonsense they have to deal with can clog the system.

When its your language, it makes it far more likely for you to happen upon the information while drunk on a sunday after noon going "Lol, I wonder what my players are talking about."