Deep Speech

Spoken by: Mind flayers, githyanki, githzerai,  kuo-toas. Script: Rellanic.

Deep Speech is a language related to the alien communication of the Far Realm, used by creatures influenced by the corrupting energy of that realm. The language uses the Rellanic script of elven languages: the drow were the first to transcribe Deep Speech, since they share Underdark haunts with aberrant creatures.