That's a direct quote from the stickied thread in the other languages board. Op couldn't quote it directly because that thread is locked now. And the rule is for languages that already have a dedicated thread on that board to prevent spam, all posts in that language should be made in that board. I am not sure if this rule is strictly followed.

I would say you have an argument to be allowed to create your own thread, the forum allows one who does not wish to be moderated by a fellow member to create their own thread, and that should apply to local threads as well. But it would be best for the Bangladesh community to come together and discuss on these issues so different threads do not start springing up, while it waits for a local board.