Jawaese was the native language of the Jawa species from Tatooine. It was mainly composed of meaningless syllables, supported by pheromone produced scents, which allowed it to be understood. Jawa communication was based in these scents to such a high degree that the scent a Jawa gave out could tell others about that Jawa's mood.
Jawas could not pronounce Basic language or many other extended languages due to several vocal limitations of the species. They could, however, learn to understand most existing languages.
Because the Jawas were known for bargaining with other species, they created a simplified form of their own language, the Jawa Trade language, to speak with Humans and many other species. The Jawa Trade Language did not require the use of pheromones in order to communicate.
Jawa Trade language, much unlike the rough barking of the Tusken Raiders, could be more easily learned by Humans. The language was spoken very quickly and had been described as jabbering.
Jawaese was first heard in Star Wars Episode IV: A New Hope. Ben Burtt developed the language for the Star Wars saga. He was drawn to several African languages, in particular Zulu. After recording several individuals who spoke Zulu, Burtt wrote a script patterned on the various sounds he heard and had actors re-voice them for the films. The “recordings were sped up to raise the pitch and accelerate the flow of words” to give us the Jawa language with which we are familiar today.