How is this question framed? (rather slickly)

Hence the word "hope".

yeh which just goes to show all languages have their strong points and their drawbacks ;)

using afrikaans and english every day of my life I realize that that there are certain things that can just be better said in afrikaans than in english and vice versa the same applies to all other languages

Oh yes, I forgot Afrikaans/Dutch has many untypical interrogatives. :) But I doubt think Germans say "wievielste". The question can be put in German in quite the same way as in English: "Wieviel deiner Geschwister wurden vor dir geboren?".

I might be wrong. I performed a random Google search and found quite a lot of samples using "wievielste" or "wievielster". The examples are mostly colloquial though, I don't know how standard that form is, and if it is acceptable in non-colloquial usage. But anyway, Germans do use "wievielste", although I have never used it myself (but then, I'm not German either).

Yeah, German dialects do vary quite a bit from standard Hochdeutsch, which is the only sort of German which I myself have much knowledge of, expressions such as "moin", "Tach" (standard Hochdeutsch "Tag"), and "bis später" (formally "auf Wiedersehen") aside. I myself haven't used "wievielste", but its use isn't /that/ surprising, all things considered.