Questions about Black Speech

[BalrogRingDestroyer]

Was it Melkor or Sauron who created it? And when was it first used? Would it have been the dominant language of Middle Earth had Sauron won?

 

[Elthir]

Was it Melkor or Sauron who created it?

Sauron, it is said

And when was it first used?

Second Age

Would it have been the dominant language of Middle Earth had Sauron won?

We know that at one point Sauron failed to make it the language of all those that served him -- which seems a nice way to avoid the actual question.

 

[Azrubêl]

Fun fact, anyone can become fluent in Black Speech in less than 1 day: http://tolkiengateway.net/wiki/Category:Black_Speech_words
(There are apparently 17 known Black Speech words or phrases)

 

[Elhath]

Was it Melkor or Sauron who created it? And when was it first used? Would it have been the dominant language of Middle Earth had Sauron won?

"It is said that the Black Speech was devised by Sauron in the Dark Years."
(The Peoples of Middle-earth, page 65 in the HarperCollins edition)

Though obviously Morgoth's Orcs used words such as golug (= Noldor) already in the First Age.