I had an amusing encounter once at a Taco Bell.
This encounter was in the 1990s, when I was at university studying environmental sciences and two languages, Spanish and Russian.
I walked up to the counter at the Taco Bell near my university, Portland State. A Mexican worker greeted me. So I ordered my tacos in Spanish.
When the food was ready, it was a Russian guy who slid the tray over to me. I said, “spacibo.” Russian for thank you.
There was a guy on my side of the counter, sitting on the floor replacing a bulb in the indirect lighting under the lip of the counter. He looked up at me in wonder, and said, “How many languages do you speak?”
I answered, “Just English.”
I’ve found that humility is the best course when trying to talk to people from other cultures, speaking languages that are different from my native English and German.