I've got this great idea that you might want to try. How about using English in the Regular Forum!!!
What I'm saying is that writers use Japanese phrases and it confuses readers, since they are might be only English-speaking people.
Those of you who want to use Japanese can use the Japanese Forum
. Althought there isn't much activity there, no threads at present. This behavior might spark some activity.
If you really feel a compulsion to use Japanese phrases, maybe you can keep it within parentheses - stupid (baka).
Just a thought.