Black Speech is the fictional language associated with Mordor in J.R.R. Tolkien’s The Lord of the Rings.
Tolkien describes Black Speech as a language created by Sauron for the servants of Mordor. Its best-known surviving example is the inscription on the One Ring: “One Ring to rule them all,” written in the Tengwar script but expressed in Black Speech.
Black Speech is different from the writing system used to display it. Tengwar is a script, while Black Speech is a language. It is also distinct from Sindarin, a major Elvish language, and Westron, the common speech used by many peoples in the narrative. Tolkien did not provide a large complete vocabulary for Black Speech.