Kung fu. Gracias. Taco. Words taken completely or in part from another language are known as loanwords. Many languages borrow and lend to one another. There are many examples of English phrases being used in Spanish language and vice versa.
While English and Mandarin don't sound very similar, there are some surprising phrases borrowed by English from Putonghua. Gung ho, chow and perhaps even ketchup are some examples.