Let's say a German user has a problem with using the Pyra, and posts it casually on a German forum. Turns out it's some kind of bug, and they find a fix/workaround. Now they should report in on the general, English-language support forums, possibly go through translating their train of thought, posts etc. That's some work, some duty. And if they don't, when the bug resurfaces on the English forums, there is either a chance none of the German-speakers will be around to say "hey, I saw this one, we found a solution", or he will have to say "hey yeah we have a solutuion for it but it's in German, hope You make sense out of it" or explain it one by one.
The above of course is a super exaggerated situation and with our fine sense of community it quite possibly may never happen in such a setup, but still...