Conversation so far:
What languages are/were spoken by the Indigenous people of mexico?
The Law of Linguistic Rights of the Indigenous Languages recognizes 62 indigenous languages.
What are the most popular (or a few of the most spoken) language(s) from the 62 indigenous Mexican languages?
The only single indigenous language spoken by more than a million people in Mexico is the Nahuatl language.
Are there culturally different people residing in different territories in Mexico?
In 2015, 25,694,928 people in Mexico self-identify as being indigenous of many different ethnic groups.
What is significant or unique about the ethnic groups and or their culture in Mexico?
Mesoamerica was densely populated by diverse indigenous ethnic groups which, although sharing common cultural characteristics, spoke different languages and developed unique civilizations.
What indigenous language did the indigenous people of Mexico speak?
There are huge corpus of colonial-era documentation in the Nahuatl language, Mixtec, Zapotec, and Yucatec Maya.
What work or occupations were the indigenous people of Mexico involved in?
Natives performed low-paid or underpaid labor for a certain number of weeks or months on Spanish enterprises.
What more does the Indigenous peoples of Mexico article say about Spanish and other indigenous languages?
The Law of Linguistic Rights of the Indigenous Languages recognizes 62 indigenous languages which have the same validity as Spanish. Approximately 6.7% of the population speaks an indigenous language.

Question: What did the government do with this data collected?
Self-contained rewrite: What did the Mexican government do with the data collected about indigenous languages?