Devaronese
From Wookieepedia, the Star Wars wiki.
Devaronese was the native language of Devaronians, and the official language of their planet, Devaron.
It was a guttural language using many consonants similar to grunts and grumbles.
Most of its native speakers were bilingual in Devaronese and Basic; however, they usually spoke Basic with a remarkable accent due to the influence of Devaronese. Strangely, male Devaronians usually did not read Basic, while female Devaronians could read and write Basic.
