Trigadasleng

So The 100 is back for its third season, again to put CW teens through the ringer in a brutal post-apocalypse (which is really fun to watch, if you haven't seen it). Trigadasleng, the sort of pidgin-sounding language of "the Grounders" (the primitive survivors on Earth that our space station bred protagonists must contend with) is pretty well developed, it turns out.  It was developed by David J. Petersen, the same guy who did Dothraki and Valyrian for Game of Thrones.

Check out this overview of Trigadasleng and this fan made full dictionary. Could be useful for your own post-apocalyptic setting. Gamma World-ese (at least as portrayed in the monster naming) isn't too conceptually different.