[@pyroman] I'm not sure ASL or any other sign language would work very well considering they're...Probably not gonna have five fingers.  Just like how Eve's slightly inhuman in the fact that they appear imp-like, it's very likely Gembone will be slightly reptilian in appearance as Gembone's pretty much just mineralized dinosaur bone. But if they did, that'd be cool. They could probably learn morse, though, since they'll still be able to make sounds.

And I've written a few non-verbal characters before, I think I did a decent job. It was originally just a way to practice not resorting to floating head syndrome in my writing (which I think I still struggle with sometimes), but I began to really enjoy writing such characters.