I'm learning ASL. That led me to learn about Deaf culture in North America. The stories that the Deaf have told each other, and have passed down. A world where everyone is deaf is one of the first stories you'll learn about; I'm not even sure when I first encountered it, but it was in that context.

One common modern version of the fable is told with an astronaut who finds that they've landed on a parallel Earth where everyone is Deaf and sign language is the norm.

The book A Study of American Deaf Folklore by Susan D Rutherford is a bit dated now but interesting in exploring the functions and roles of myths here.