Editing Uto-Aztecan languages (section)

===Proposed external relations===
{{main|Aztec–Tanoan languages}}
An "Aztec–Tanoan" macrofamily that unites the Uto-Aztecan languages with the [[Tanoan languages]] of the southwestern United States was first proposed by [[Edward Sapir]] in the early 20th century, and later supported with potential lexical evidence by other scholars. This proposal has received much criticism about the validity of the proposed cognate sets and has been largely abandoned since the end of the last century as unproven.<ref>[[Lyle Campbell|Campbell, Lyle]]. (1997). ''American Indian languages: The historical linguistics of Native America''. New York: Oxford University Press, p. 269–273.</ref>