I'm no expert on tacos or burritos.
True statement - I never had either until I went to college! Latin American food is roughly divided in 3 regions (which are somewhat related to the different races of natives and colonizing influences).
1. What you know as Mexican food is pretty similar along what used to be the Aztec and Mayan empires (Southern US, Mexico, El Salvador, Guatemala, Honduras, Nicaragua).
2. Caribbean food (nothing tortilla based - lots more viands, roots, etc) - roughly the area around the Caribbean islands and northern South America. Cuba, Puerto Rico, Dominican Republic, Costa Rica, Panama, Colombia, Venezuela). Many different tribes here, but mostly dominated by Arahuac natives and local island tribes like Tainos, Caribes, etc.
3. South American food - basically what used to be the Inca empire. Food similarities for most South american countries south of Colombia/Venezuela. Their food also does not use anything with tortillas.
Sorry for the long Latin American food sidetrack. Most people in the states assume we all eat the same type of food, but what is popular here as Mexican food is only a small portion of what Latin American food is really like. And oddly enough, it is very different from what the rest of Latin American food is really like, when you take into account that tortillas, tacos, burritos, enchiladas, etc are not consumed anywhere besides upper Central America.
Oddly enough though, we have started seeing more Taco Bells in Puerto Rico.