Most sources seem to call the language of Sauron's servants the Black Speech and/or the language of Mordor, while other languages have their own names, such as Khuzdul, Quenya, and Sindarin. Does the Black Speech have an actual in-universe name, either in its own language or in another of the languages of Middle Earth?
The Black Speech certainly has a name. Sauron was the language inventor, and surely somewhere in his grammar notes he would have given it a name. Tolkien never reveals a "proper" name nor offers a hint as to what it could be. "B.S." is almost surely a sense-translation from the Westron name, and one would hazard the guess that its Elvish counterpart would be similarly constructed.
- In Letter 144, he just calls it "Black Speech".
- Foster does not record a B.S. name for the language (though does hint that Sauron was, perhaps, something of a hack language inventor stating that B.S. could be based on Quenya).
- Similarly, Tyler does not record a name.
- In The Peoples of Middle-earth, C.J.R.T. says "The Orcs had a language of their own, devised for them by the Dark Lord of old" and "It is said that the Black Speech was devised by Sauron in the Dark Years." Elsewhere in the same volume, a sentence is translated, but the language again is called "Black Speech".
- We shouldn't be surprised he never gave the B.S. a name other than the English / Westron moniker. Letter 343 expresses Tolkien's gut reaction towards the hideous speech upon receiving as a gift a goblet with the Ring inscription engraved upon it. In characteristic Tolkien fashion, perhaps, he used it as an ash tray.
1. Letters of J.R.R. Tolkien, 1981, p. 178;
2. Complete Guide to Middle-earth, 1978, p. 48;
3. The Tolkien Companion, 1976, p. 65;
4. The Peoples of Middle-earth, 1996, p. 65 pr. 16;
5. Letters of J.R.R. Tolkien, 1981, p. 422