Salish
noun
Sa·lish ˈsā-lish 
1
: a group of American Indian peoples of British Columbia and the northwestern U.S.
2
: the family of languages spoken by the Salish peoples
Salishan
ˈsā-li-shən
adjective or noun 
Word History
Etymology
Flathead dialect of Interior Salish séliš, a self-designation
First Known Use
1831, in the meaning defined at sense 1