[3] The Yuki are the original inhabitants of the Eel River area and the Round Valley Reservation of northern California.

Yuki ceased to be used as an everyday language in the early 20th century and its last speaker, Arthur Anderson, died in 1983.

[5] The three Yukian languages diverged from each other over the last one thousand years, while dialectal variations in Wappo are even more recent.

An extensive reference grammar of Yuki was published in 2016 and is based primarily on the texts and other notes recorded by Alfred L. Kroeber from Yuki speaker Ralph Moore in the first decade of the 20th century as well as elicited material recorded from other speakers later in the 20th century.

This grammar also contains sketches of Huchnom and Coast Yuki based on the notes of Sydney Lamb and John Peabody Harrington, respectively.