I didn’t know “Mexican” was a language.
I spent quite a lot of time in Honduras for work. Ask one of them what they speak in Mexico and they will tell you it's Mexican and they can't understand it. Yes, I realize it's Spanish, but it's significantly different, enough so that Hondurans understand Mexicans about as well as you might understand Italian(assuming you don't already speak it). Some of the words are similar but everything else is different.