Kin/fictive languages...
Well. A certain Stoat often spoke in binary code just to fuck with me. Haha. ,,^^,, He did the same with the others too, but mainly me.
The Stunted Wolf used to speak to me in Runes and such, or at least... That's the closest I can think to put it in human languages. It was definitely much different than whatever Runes exist in this world?
I preferred to speak to everyone in a style of Runes too, though when possible I spoke through bones/bone carvings, difficult to explain. Or I'd write letters to everyone when possible.
The Game Master, he uh... Didn't speak. Unless he had to. He'd write letters or have The Prospector or The Angler speak for him. Partially due to anxiety but also partially because he just, hated talking.
Of course though we had a common language between us all, but we learned each other's mother tongue too out of... Respect, I suppose. Not the exact word I had in mind but it'll do /lh
-The Stinkbug/Grimora (fictive, source is Inscryption)