User blog comment:Marek Szymonski/Yet Another Stupid Challenge!/@comment-24425594-20150618072735

So whenever I'll develop Quxnaṣ (already kind of a proto for most languages of area where it's spoken in my conworld) I'd be glad to nominate it as the ancestor lang, but there are two problems, those being the rules and the batshitness of the lang itself.

Xwarṣa and Ødilaaïffe are totally ok.

For more try browsing inactive conlangs, bc there are more complete inactive conlangs than complete active conlangs.