My people are mostly from NE and NW Spain.
We tainted the French bloodlines.
I can trace back to what I think is a Catalonian ancestor. This area today is mostly in Spain, but a small part is in modern day France.
My ancestor's names occur today in Spanish language locations. Therefore by the "one drop" rule, I too am Hispanic.
I totally understand your criticism of using a language grouping, alongside a racial grouping. Blame the fedgov, not me.
One of my earliest memories is the guy who drove the water truck, to keep the dust down on the gravel street we lived on in Colorado. He convinced me he was the Cisco Kid, back in the early 1950s.
Then when we moved to California, about 1/4 of my first grade class were Hispanic kids, or whatever we call them this decade. I am still in contact with a few of them. Most have intermarried, so in our area people with essentially the same blood mixes might be named Smith or Garcia.
James Michenor's books titled "Texas" and "Mexico" explain history of early European colonization. In the early days, there was a hierarchy of status, for Spanish born (top), Spanish born in Mexico, mixes with native Indians, and pure native Indians (bottom).
That hierarchy continues, to some extent.