Conversation so far:
what is the most spoken language in Mexico
Spanish is the most spoken language in Mexico
Are there any other languages spoken in Mexico besides Spanish
There are other languages spoken in Mexico. One widely spoken language in Mexico, aside from Spanish, is Nahuatl, which has more than 1.7 million speakers.
what other language is spoken in Mexico besides Spanish and Nahuatl
Maya is spoken by around 850,000 people, and Mixtec with more than half a million speakers.
Is Spanish the official language of Mexico
while Spanish is the dominant language in Mexico, it is not defined as the official language in Mexican legislation.

Question: why
Self-contained rewrite: Why is Spanish not the official language of Mexico