While I was washing dishes I was having a write-a-palooza. I was thinking up whole sequences to write. Fairly good stuff, too. Additional information about the Skavoon, their cultural variations, the character significance of their sexual and childrearing lifestyle, and some ideas about common themes in their literary tradition that would be different from that common to human cultures. Sadly, at the time I was washing dishes. Not conducive to getting this down on paper. Certainly not conducive to getting this down on bits and fast-moving electrons.
My first thought was that possibly I had underestimated the amount of cultural variation that would have developed. First of all they nuked themselves(or they were nuked)into the Stone Age about ten thousand years previously. That’s a very long time, even for a very staid culture. Secondly, I suspect that the fall of the Waqu culture was a very thoroughgoing one. Knocking a technologically advanced society into the neolithic is no small matter. I think there’s a good chance that a very large fraction of the adult population was killed outright or very soon thereafter.
Most of the Skavoon surviving the cataclysm were likely children running wild in the wilderness. This meant that when they reached adolescence there was a serious dearth of adults to act as mentors. What happens to young Skavoon when they reach maturity without proper adult supervision? I suspect there may have been one or more generations of Skavoon who weren’t properly socialized at all. The instinct, to find a mentor, however is inbred. Even though the first cadre of fully-grown Skavoon wasn’t properly educated, instinct would have driven the young to them and instinct would have driven them to teach those young as well as they could. Perhaps a Skavoon mentor would have found it easier than a human in a similar situation to teach its proteges a new language of it’s own devising.
At the same time the few surviving adults from the previous culture would be working hard to rebuild their old ways. They would raise their own proteges, fully inculturated to the old ways. On the one hand, these lines would have the advantage of knowing how to handle relict technology and also have a fully ready made language and social structure waiting for them. On the other hand, how well equipped would those adults be to handle this new post-apocalyptic world? Very likely there wouldn’t be enough of the old-time equipment left to build new technology or even to maintain their existing tools in the long term. They might have suffered a real crash. Surrounded by competing tribes who had likely come to a better understanding of the new situation, at first their grasp of relic technology would give them a foot up, but that couldn’t last. Ultimately, the remaining equipment broke down, the surviving adults were too few in number to carry forward a sufficient subset of the old knowledge. Some would scramble to learn what they could, but without a knowledgeable teacher how many accountants and office workers can learn advanced quantum physics? At the same time these survivors, mostly urban if their technological stage was anything like that of the humans, would have to develop their skills in areas like farming and animal husbandry(or, failing that, hunting and gathering). Surviving adults with agricultural and pastoral skillsets would be sought after. Both by the survivor cultures and by the new societies, grown from more feral roots.
I suspect that while the language skills and desirable, useful skills of the surviving adults would continue to some degree, once the old tools broke down, those survivors would be run down and subsumed into the newly developing cultures. The Waqu language, assuming they were down to only one is going to survive as a root to future languages, but there would likely be a lot of divergence. Some remnants of old Waqu cultural structures and hierarchies would probably spread and mutate.
As anyone who thinks about post-apocalyptic stories much(I try not to be one of those, who am I kidding?) knows, the time after the Great Disaster is going to be a time when existing things are tested and new things try their hand. The formerly marginalized will try to make their own changes, even among the surviving adults. This is a time when those weird ideas you were always afraid to let anyone know about can come out. This will be a time of survival of the fittest.