Mexican is a nationality…not a language.
You have probably never heard border spanglish. It is pretty unique in vocabulary and syntax.
Spanglish
“Mexican is a nationality...not a language.”
He knows that. He was making a point,...which you missed.
“Mexican is a nationality…not a language.”
Sure, it is. They rarely speak proper Spanish.
“Mexican is a nationality…not a language.”
Actually believe it or not, it is a language/dialect of it’s own and labelled as that.
Spanish vs Mexican: Similarities and Differences
https://www.spanish.academy/blog/spanish-vs-mexican-similarities-and-differences/