Nez Perce has two principal dialects, Upper and Lower. Sahaptin has somewhat greater internal diversity, with its main dialects being Umatilla and Yakama.
Noel Rude's (2012) classification of Sahaptian is as follows.[1]
Aoki, Haruo (1970). Nez Percé grammar. University of California publications in linguistics (Vol. 62). Berkeley: University of California Press. ISBN0-520-09259-7.
Mithun, Marianne (1999). The languages of Native North America. Cambridge: Cambridge University Press. ISBN0-521-23228-7 (hbk); ISBN0-521-29875-X.
Rigsby, Bruce (1965). Continuity and change in Sahaptian vowel systems. International Journal of American Linguistics, 31, 306-311.
Rigsby, Bruce; & Silverstein, Michael (1969). Nez Percé vowels and proto-Sahaptian vowel harmony. Language, 45, 45-59.
Rude, Noel. (2012). Reconstructing Proto-Sahaptian Sounds. University of British Columbia Working Papers in Linguistics, Vol. 32, pp. 292–324. Papers for the Forty-seventh International Conference on Salish and Neighbouring Languages, Cranbrook, British Columbia, Canada, August 3–5, 2012, edited by Joel Dunham, John Lyon & Natalie Weber.
References
^ abcdRude, Noel. 2012. Reconstructing Proto-Sahaptian Sounds. In Papers for the 47th International Conference on Salish and neighbouring languages, 292-324. Working Papers in Linguistics (UBCWPL). Vancouver: University of British Columbia Press.
^Rude, Noel. 2006. Proto-Sahaptian vocalism. In Papers for the 41st International Conference on Salish and neighbouring languages, 264-277. Vancouver: University of British Columbia Press.