Don't belittle that immigrant guy who can not speak English.
To him that job is an opportunity.
Someday he will rise and speak a better English, open his own business and employ your kids. Rather than looking at that job as disgusting or the people, look at that as a Golden Opportunity to train yourself and built a foundation on the value of a good work ethic and the fluidity of adaptation. Your schooling has its limitation, its your ability to understand the depth of your character that will help you succeed in the new super competitive fluid world (you might have five or more careers in the new world order).
In this 21st Century World being an English only speaker will limit you to advancement, in fact if you speak English only now, you are already a minority in the lower middle management of Industry and Government.
Take the time to learn a little language he speak is not going to hurt you, are you not a student right now--then used that time wisely for an education has never hurt anyone?
I spoke six languages and it led me from my first job working at a slaughtered house for six months after graduation from college before I went over sea and work for Uncle Sam, Wall street and being Self-employed and be free to do what I want.
Upon arriving in the Middle East, my Hitler Youth looking Superior gazed at my dossier and demanded me with the arrogant disdain why I did not take the six months and travel the US and see my new adopted country like every rich bastard patriots from my college and instead work at a slaughter house with communist immigrants?? My answer to my Directorate D Boss was that the government was not paying me the tax free salary and bonus hardship posting yet, so who is going to paid for my living expenses, student loan and helping my parents paid for my younger siblings just entering Harvard and Yale--we ain‘t wealthy (Pop & Ma work at the Jolly Green Giant Cannery) and well connected like him and barely escape the Viet Cong bullets to America; the slaughter house was the highest paying job on the graveyard shift in our home town more than thirty five years ago.
There were immigrants from the Soviet Union, Eastern Bloc (Iron Curtain Countries of Eastern Europe), Middle East working at the slaughter house, folks with advance education but their English and dream are limit for the time and I made many friends all working for our share of the American dreams; I was a vegetarian for six months after that and I do not touch hot dogs or sausages unless I made it myself to this day!!!
Taking on the most dangerous job with the highest bonus hardship that no one would take accept the team of twelve Hellhound members I have assembled. We came back alive achieving the Congressional Medal of our lives, one of only two of the two dozen teams send in for that kind of work that made it back not in body bags, we walk into history knowing in our heart we have served and saved a lot of American Lives for generation to come.
My boss however being a Harvard Educated and a direct descendant of one of the Mayflower had this precocious notion about who is an American always making fun of my accent and calling me "Charlie". Well no one know what happen, he and his team never came home in a body bag and I felt sorry for him and his team families--classified for sixty years like us!!!
He was always taking the soft clean post and well I could never figure out why a white sheep always hiding in a sea of black sheep???
He never made any attempt to blend in with the natives, learn the cultures, his patrician mentality render him into an obsolete missing corpse and condemned his team; my plebeian mentality bring home my team and now allow me a patrician life style but I still live like a plebeian.
Look at every job as a golden opportunity to learn, it is a foundation for your future happiness.
Stick with that bus boy job for the summer and stay in school and I might be inclined to answer your PM request to take you giant snake head fishing this Hurricane season!!!