I fully agree with your remark.
Language restrictions should be motivated when applied and they should be some few exceptions in problem set.
I often ask to open to all languages, some psetters don't care about those requests.
EB members can't change the language selection ; admin can.
The only thing I can propose is to happen at this thread some messages :
Please, no message like : copy_of_a_precedent and "+1".
After some amount of messages we can write to admin who will treat the whole train, and edit messages with something like : "done" or "sorry but language restrictions are justified here" (if need).
I hope this democratic survey/method and admin final answer will satisfy everybody, and make an as quick as possible answer to this old question.
I hope psetter will allow more languages in the future.