It is likely that the ruling family of the Acolhua were descended from Otomi speakers and did not speak Nahuatl until decreed by their ruler (tlatoani) Techotlalatzin.[2]
Under Techotlalatzin's grandson, Nezahualcoyotl, the Acolhua allied with the Mexica (Aztecs) in the Aztec Triple Alliance. The Acolhua capital, Texcoco, became a cultural center of the resultant Aztec Empire.
Footnotes
^ Smith (1984, p.171), who arrives at this date by averaging six dates mentioned in early codices.