Maidu language

Maidu /ˈmaɪduː/, also Northeastern Maidu or Mountain Maidu, is an extinct Maiduan language of California, United States. It was spoken by the Maidu peoples who traditionally inhabit the mountains east and south of Lassen Peak in the American River and Feather River basins. These river regions include such valleys in the northern Sierra Nevada mountains of California as: Indian Valley, American Valley, Butte Valley, and Big Meadows. Maidu may also refer to the related Konkow and Nisenan languages.