Proto-Nahuan is the hypothetical daughter language of the Proto-Uto-Aztecan language which is the common ancestor from which the modern Nahuan languages have developed.
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Homeland
There is some controversy about the location and time period in which the Proto-Nahuan language was spoken. Following Nahuan ethnohistorical sources describing a southwards migration of Nahuatl speakers, combined with the locations of all other Uto-Aztecan languages to the North of the Nahuan languages, the homeland has traditionally been considered to be located to the north of the current area of extension. An alternative hypothesis forwarded by Jane Hill sees proto-Nahuatl as having arisen within Mesoamerica, and the Nahuas as the only remainders of a large scale northward migration.
Phonology
Some phonological changes shared by all Nahuan languages are:
Morphology
The hypothetical Proto-Nahuan is hypothetically an agglutinative language, where words use suffix complexes for a variety of purposes with several morphemes strung together.