Nahuatl is an Uto-Aztecan language spoken by about 1.4 million people in Mexico. The majority of speakers live in central Mexico, particularly in Puebla, Veracruz, Hildago, San Luis Potosi, Guerrero, Mexico (state), El Distrito Federal, Tlaxcala, Morelos and Oaxaca, and also in El Salvador. There are smaller numbers of Nahuatl speakers throughout the rest of Mexico, and in parts of the USA.
Nahuatl was originally written with a pictographic script which was not a full writing system but instead served as a mnemonic to remind readers of texts they had learnt orally. The script appeared in inscriptions carved in stone and in picture books, many of which the Spanish destroyed.
The Spanish introduced the Latin alphabet to write Nahuatl, and a large amount of prose and poetry was subsequently written. Every since there has been considerable debate about how to spell Nahuatl.