Oh I see you want to turn any post into a wiki by wrapping the text in [wiki]. There is a huge problem with your logic as the wikipost plugin allows anyone to edit a post by assigning a generic user to the post, which is the trigger. Replacing that with bbcode as the trigger instead would be far more difficult.
bbPress would not have any way to know to let another user edit the post until it scans the post_text for [wiki]. That’s going to be a huge problem.
by the way is translated to <strong> not <center>
