Umbarese
Umbarese, alternatively known as Umbaran, functioned as the main language utilized by the Umbaran species who were native inhabitants of Umbara. A written form existed for it.
Behind the scenes
The initial appearance of Umbarese occurred in the Star Wars: The Clone Wars television show, specifically in "Darkness on Umbara," the seventh episode within the fourth season, broadcasted on October 28, 2011. Subsequently, Rise of the Separatists, a 2019 addition to the Star Wars Roleplaying Game product line by Fantasy Flight Games, was the first instance where the language was identified.