Do Mexicans have to press 1 for Spanish in Mexico? I didn’t think so.
When I lived in Venezuela there was not a press 1 for Spanish, or press 2 for English. It was all in Spanish and if you did not speak Spanish you were out of luck. That was back before Chavez and it was a great place to live then.
Maybe—some of the native Americans there are so isolated, they never learned Spanish: note how some of the so-called “vulnerable children” crossing the border, speak only tribal languages.