Yes Nachos are Mexican.
Nachos were invented and originated in Mexico by a Mexican.
The Nachos that most Americans eat were invented and originated in a small Mexican town of Piedras Negras in 1943 and were invented by restaurateur, Ignacio “Nacho” Anaya.
A lot of Mexicans do eat Nachos but more Americans eat Nachos than Mexicans.
Nachos can be found in almost any restaurant in American as well as some gas stations.
Even making Nachos at home is very easy as you only need Nacho Cheese and Nacho Chips and if you want other ingredients you can also add those ingredients.