Are we allowed to write in another language than english on the comment box of a profile?

No, I'm afraid not.

It is allowed for sMail, but not comments.

really? never heard of that They should mention this somewhere. I would understand in the forums though.

It is mentioned in the rules, which you can find by clicking 'help' on the sidebar. You should probably read those through if you haven't yet.

boy, I should I guess. thanks.

You're welcome.