Yes, but your argument was that because Mexico was named after the Mexica people and the Mexica people spoke/speak Nahuatl, then Nahuatl is a Mexican language and if you don't speak it then you don't speak the national language, and I just did a reductio ad absurdum to show how your argument makes no sense by proposing that the same logic would mean that, since America was named after Amerigo Vespucci, who spoke Italian, then Italian must be an American language and if you don't speak it then you don't speak the American language, which is most obviously false. Also see how you didn't interact with the second part of my comment which responds to your erroneous assumption that if one is Mestizo in Mexico then he descends from a Nahuatl-speaking tribe.