The "Hokan hypothesis" was first proposed in 1913 by
Roland B. Dixon and
Alfred L. Kroeber, and further elaborated by
Edward Sapir. Initial follow-up research found little additional evidence that these language families were
related to each other. But since about 1950, increased efforts to document Hokan languages and to establish sound correspondences in proposed lexical resemblance sets have added weight to the Hokan hypothesis, leading to its acceptance by many specialists in the languages of California, Oregon, and
Mesoamerica. However, some skepticism remains among scholars. Linguist Paul Rivet claimed the
Yurumanguí language of
Colombia was part of the Hokan family. This claim has not been accepted by historical linguists. Terrence Kaufman wondered if Hokan might be related to
Oto-Mangean of Central America. An automated computational analysis (
ASJP 4) by Müller et al. (2013) found lexical similarities among
Seri,
Yuman and
Tequistlatecan. However, since the analysis was automatically generated, the grouping could be either due to mutual lexical borrowing or genetic inheritance. ==Distribution==