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Aztec-Nahuatl language Olmecs-It is not known with certainty whether Olmec culture was in fact just one culture or instead a multi-ethnic cultural complex, what language or languages they spoke, the societal or political structure of Olmec society, how their civilization arose, or why it declined.eport Abuse. the Aztecs spoke Nahuatl, The Mayans spoke... Mayan, the Incas spoke something called Quichua or Quechua. It is actually not officially known what language the Olmecs spoke, but if it's anyhelp their written language is Zapotec.
Another development of the Olmec which spread to other Mesoamerican civilizations was writing. In Mesoamerica, the concept of writing appears to have been first developed by the Olmec. In addition, they used the concept of zero in their mathematics.