 An "Ewokese" language was created for the films by "Return of the Jedi" sound designer Ben Burtt.On the commentary track for the DVD of "Return of the Jedi", Burtt explains that the language is based on Kalmyk, a Mongolic language spoken by the Kalmyk people of Russia.Burtt heard the language in a documentary and liked its sound, which seems very alien to Western ears.