Well, first, I don't know what to make of the tracing of the Aztecs' legacy, UNDER THAT NAME, back 10,000 years. I do know they had a knack for falsifying their history and that they were the wandering mercenaries of Mexico prior to them settling down to already built (by previous cultures) structures in what is now Mexico City and surrounding areas. I would love to see research tracing their history to such remote times.
A tortilla coming from the Spanish word "torta". Be that as it may, if you ask for a tortilla in Spain you will get something very similar to what Americans call a "frittata", made of eggs, potatoes, green peas and possibly onions, all depending on the region.
They DO have the type of "tortilla" that is extremely similar to
Mexican tortillas in SOME regions of Spain, i.e., Galicia and Asturias. They look and feel just like the wonderful HOMEMADE (not the store-bought cardboard-like ersatz tortillas) Mexican tortillas but they have a SWEETER taste to them and they are called "Freichuelos".
When talking to Spaniards in my family and their friends about a Mexican "burrito" , I still remember fondly how they humorously asked me: "You mean they wrap an omelet around a small donkey and eat it?!"
The Mexicans and the Spaniards: Two peoples divided by a common language.