Speakers traditionally lived in the Colville Indian Reservation.

There were two dialects, Columbia (Sinkiuse, Columbian) and Wenatchi (Wenatchee, Entiat, Chelan).

Pauline Stensgar, who died on May 2, 2023 at age 96, is reported to have been the last known fully fluent speaker.

[2] Phonological inventory of the Columbia-Wenatchi dialect: The three vowels in Moses-Columbia are /i/, /a/, /u/.

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