A Gorn speaks.
The Gorn language was the language or collection of languages[1] used by Gorn species. (ENT episode: "In a Mirror, Darkly, Part II", Adventures RPG module: Beta Quadrant Sourcebook)
Specifics[]
The language of the Velociraptor-like Russth[2] consisted of a series of hisses and low growls. (ENT episode: "In a Mirror, Darkly, Part II")
In the 25th century, translators allowed listeners to hear the underlying hisses and growls. The translation itself included a hiss or lisp. (STO - The 2800 mission: "Second Wave")
By 2371, Federation xenobiologists had determined the Gorn were a multi-species society. Each species had their own name for the shared homeworld Tau Lacertae IX, which had confused Federation earlier into believing they were separate planets. These names were Gornar, Agornu, S'sgaron, Garag, Koreb, and Shekkis. (Adventures RPG module: Beta Quadrant Sourcebook)
The Gorn's written language appeared to be a series of rounded scribbles. (TNG comic: "The Gorn Crisis")
Alternate timelines[]
In the mirror universe, Gorn interacted with Tholians and Terrans. Translators enabled mutual intelligibility. ENT episode: "In a Mirror, Darkly, Part II")
In the Kelvin timeline, the extragalactic Gorn Armada spoke in a language were some phonemes resembled English words "chicken", "biscuits", "warthogs" and "rabbits". In 2259, Federation linguist Nyota Uhura could only decipher a small portion of the Gorn language. Commander Spock attempted to mind meld to bridge the linguistic barrier. (TOS video game: Star Trek)