Thread:User talk:CodeCat/mw.text.split()/reply

That function has only recently been added and is probably not in our current Scribunto installation yet. So does it work? Probably not actually... but functions that don't exist are fine as long as they're not called. The module bypasses the split if it "sees" that the string consists only of a single gender code, so there are no errors then. Dutch uses this module now, but it has no multiple-code genders since it only needs m, f, n and p (there is no m-p and such) so it works, by coincidence.