Las lengas palaihnihanas son una pichona familha de lengas amerindianas parladas dins lo nòrd de Califòrnia als Estats Units.
Las dos lengas palaihnihanas son :
- (en) David L.Olmsted, 1964, A history of Palaihnihan phonology, University of California publications in linguistics, Vol. 35, Berkeley and Los Angeles, University of California Press.
- (en) David L. Olmsted, 1966, Achumawi Dictionary, University of California Publications in Linguistics, Vol. 45 Berkeley and Los Angeles, University of California Press.