I see no reason why a person should not promote a forum for
EU on
EF. (that is for a language other than English, and as such is not "competition")
This forum is English based. It seems likely that there will be many Romanians who have little or no usable English. I have no Romanian, so I am unlikely to leave here and go there.
Any Romanians who navigate here will stay if they have good English, and will be able to go to a much smaller forum elsewhere if they have find the language barrier too great.
No one loses, and everyone gains.