Today, more than 7 million of Mexico’s 126 million people speak 364 Indian linguistic variants (dialects), but almost 90% of those people are bilingual, speaking both Spanish and an Indigenous language. Those who do not speak Spanish are called monolingual.

From 1895 to 2015, the Mexican census has painted a picture of Mexico’s people, providing details about languages spoken (Spanish, foreign and indigenous), religion, education, literacy, employment and migration. From the beginning, the Mexican census provided details about indigenous languages spoken by its citizens. However, in the first half century, it is possible that there were undercounts of indigenous language speakers because some may have failed to declare their language status for fear of affecting their position within the community. In addition, poor communications channels with rural, isolated indigenous communities may also have caused an undercount of the indigenous people.

In recent decades, the State of Chiapas – long a neglected and oppressed region of the Mexican Republic – has been thrust onto the world stage and into the media spotlight. The attention given to the political situation in Chiapas has initiated a great interest in the plight of the indigenous people of that state. But an understanding of the present-day situation in this southern state requires a review of its history and its complex ethnic diversity.