Cynogan is the language utilized by Saucer Head. Saucer Head was a participant in a Corellian Spike sabacc game at the Lodge, a saloon on the planet Vandor located in the Mid Rim, in 10 BBY, where he spoke Cynogan. He used it on multiple occasions during the game, even while handling the cards.
The language Cynogan initially appeared, though without identification, in Solo: A Star Wars Story, the 2018 Star Wars Anthology Series film. It was subsequently given the name Cynogan in the November 14, 2019 video "Every Language in Star Wars Movies," a part of the Star Wars By the Numbers series from StarWarsKids.com.