I don't speak Spanish, but I can go to any Spanish-speaking-only restaurant and order in Spanish.
"Dos tacos. Uno Coke." Thank you Sam the Sham and the Pharos.
All a Spanish speaking person needs to learn to order at Pat's are 6 English words "One Cheesesteak all the way and one Coke."
"Coke" is a universal word.
Plus, learn the peculiar subculture of ordering: Say the minimum amount of code words, shut up and move it along with your money in hand.
A visiting English professor would get yelled at.