An interesting company of signatures, but I did not understand, you can write posts in the local?
It seems that no, messages should only be in the English branch. If you write in other branches, then most likely these messages will not count.
I would not argue about this, since this information is not backed up by the official, anyone from the team. But you have to ask for sure about this aspect in the telegram, since you have the risk of not getting stakes.