Papyrus (or Rusty) lost his jaw and speaks in sign language.
Aliza is the youngest version there is, being about 3 or so. She calls Rusty “Pap” and he calls her “L” in sign language to keep it simple for her.
The curse for them has ended, monsters are slowly rebuilding their lives, still confined to the Underground and resigned to the very real hunger the ravaged land has left them with.
As for L and Pap, they live alone in Snowdin, trying to grow crops.