sorry - google it - they were invented for americans: http://www.huffingtonpost.com/2012/05/15/nachos-inventor_n_1515233.html
I guess if there were technically invented location wise across the Texas border in Mexico we can give it to you, but it isn't really Mexican food.
Also - "can we just agree that something that's shaped like this is, by default, made for American-style crispy tacos, and know that when someone says "taco" in reference to this device, that's what they mean" --> No we can't, The point is to lose the cultural appropriation of the term "Taco"....I prefer "Crispy Tortilla" (I'm just sort of kidding here BTW...but my point is .... we should all frown on crunchy tacos...not everything needs to be subjective...you wouldn't call a mexican chef in Tel Aviv who makes his "crunchy taco" from fried pita w/ crushed falafel balls a taco right? not a "Israeli/middleastern taco right? how about crunch mooshu pancakes wrapped around meat? I'm a convert to the fundamentalist bent of neo-american-hard-taco-denial.)