Formosa Files, the internet’s most informative podcast on the history of Taiwan, recently focused on the topic of language and loanwords: Local Language Loanwords: A Lovely Hot Pot of Fujianese, Mandarin Chinese, Japanese, English, and More (season 3, episode 5). Lots of linguistic goodness, so give it a listen, and stick around for some of the many other episodes.
Although I, like Eryk, have never found jiayou (lit. “add oil”) much to my taste, the word has already made it past the gatekeepers and into English.
Formosa Files is also on Spotify and other popular content providers.