There’s also the fact that a huge portion of foreign immigrants to the US don’t and won’t learn English, but can still operate just fine (or even have the system cater to them - press 1 for Spanish).
Look at the uproar over requiring commercial drivers to be able to read road signs in English.
Along Interstate 5 in 1980s-90s Southern California, there were large signs, black-on-white, which showed a pictogram of a family running.
The English text above read "WATCH FOR PEOPLE CROSSING ROAD"
The Spanish text below read "PROHIBIDO"
The US also did annex large parts of what used to be Mexico in the 19th century, so you don't even technically have so be an immigrant to speak Spanish