The differences existing between Spanish spoken in Spain and Mexican Spanish are no greater than the differences found in American and British English. There are without doubt nuisances and colloquialisms that are particular to each country, but deviations similarly exist in regional areas within Mexico, or in Spain, or for that matter in any Latin American country.

As far as Mexico is concerned there are a variety of "lenguas indígenas" or indigenous languages that are spoken, but Spanish remains the official language. The rise of Spanish is of course tied to the Spanish conquest of the New World.

As a result of Mexico City's central role in the colonial administration of New Spain, the population of the city included relatively large numbers of speakers from Spain. Mexico City (Tenochtitlán) had also been the capital of the Aztec Empire, and many speakers of the Aztec language Nahuatl continued to be spoken there and in the surrounding region, outnumbering the Spanish-speakers for several generations.

Consequently, Mexico City exercised a standardizing effect over the entire country, more or less, becoming a distinctive dialect of Spanish which incorporated a significant number of hispanicized Nahuatl words.

The Spanish of the Yucatán Peninsula is different from all the other forms of the language, both as far as the intonation and the incorporation of Mayan words is concerned, whilst the Spanish spoken in the areas that border Guatemala resembles the variation of Central America Spanish spoken in that country.

Interestingly those areas were originally part of the Audiencia of Guatemalan and only became part of Mexico after the wars of colonial independence; until the 1870s most of the southern state of Chiapas and the Soconusco region did not officially become part of Mexico.

The migrations that took place in the 19th and the 20th century from Mexico to the United States have caused Mexican Spanish to become the most widely spoken variety of Spanish in the United States of America, except in the East Coast.

The Spanish spoken in the Gulf Coastal areas of Veracruz and Tabasco is also quite distinctive, at least at the level of vernacular speech, as the Spanish spoken there exhibits more Caribbean phonetic traits than that spoken in the remainder of Mexico. With more than a 108 million Spanish speakers and growing, Mexico is numerically, the foremost Spanish speaking country in the world today.