As am I, also in several other languages. The attorney was doing a useful service to other customers who aren't fluent in Spanish.
The illegal criminals behind the counter could be saying "put a dead rat in that customer's sandwich," and a non-spanish customer would be non the wiser.
Besides, as a citizen, not practicing his profession, what law or etiquete strips him of his Free Speech Constitutional right?
Do I believe that the illegal criminal aliens would tamper with food?
Absolutely.
My decades of visiting Cabo San Lucas once or twice a year ended abruptly in 1998 when I overheard a conversation in Spanish near where a U.S. Coast Guard cutter was docked, a group of mexicans were discussing what they planned to do to yanquis, and the other "pendejos" polluting their town.
While there, I never spoke Spanish, nor responded to any conversation. for ten years I traveled all over the peninsula, by myself, in a rented VW, miles from nowhere.
At the time, little did I know I was taking my life in my hands...
Then a few Americans residing in Cabo filled me in, The highway north of Cabo along the west shore runs close to a dirt airstrip which is busy year round with drug transfers, and wrong place at the wrong time rules...
Every year, at least one, often more Americans were killed or disappeared in Cabo, but NEVER reported in the English tourist newspapers.
But they were reported in their local Spanish ones.
After the Coast guard incident, I walked away from my two week yearly timeshare, and never returned, and wouldn't now if my life depended on it.
My daughter speaks Spanish, in fact she teaches it as a high school teacher. Blond and blue eyed, few would guess she is fluent in the language. She says I would be appalled if I knew what the illegal workers behind the counters at stores and working in restaurants were saying about us.