Instead of laying off or demoting supervisors and crew bosses because they don’t speak Spanish, why not require that the crew members learn English? Can you imagine moving to Mexico, taking a job as a firefighter and then having your boss demoted or fired because he didn’t speak English?
This is the U.S. and we speak English here! If you’re going to come to this country to live or work, you should respect our country enough to learn the language!