Mexico is the largest Spanish speaking country in the world. Spanish in a Romance language and belongs to the Indo-European group of languages. It originated as a dialect of Latin in what is today northern Spain. Spanish is one of the large world languages and is spoken by around 400 million native speakers in Spain and the Americas. Spanish is closely related to Portuguese and Italian. Mexico, furthermore, has a long list of Indian languages of which Nahuatl with 1.4 million. speakers is the largest.