As a Dutchie, I'll admit Graal has a point. It's not that I respect English people more than Afrikaans people. You bastards locked up my great grand parents in concentration camps on st Helena!
Just kidding, but seriously. English is the best and broadest form of communication for pretty much everyone on here. I always start threads etc. in English but I see no harm in secluded posts being in Afrikaans ... oder auf Deutsch wenn ich mächte.
Carrying off on a tangent in Afrikaans does create the sense of an 'insiders' club.