Hm =/ I guess they say that because the support team would also like to help out the person's problem as much as possible. To be honest, some people might not be good in english, that's why they use another language to ask the question =/
After all, the reason why they started this forum was to bring sony ericsson users around the world to post their problems, issues, etc... and see if anyone can help them. If someone asks a question in a different language, and someone else understands it, then haha, might as well help them, after all, again, he's just asking about his youtube app and he's not saying anything disrespectful, or spamming the forum.
