i love to imagine the kind of bilingual shenanigans that first happened when Zoey got to Korea and met the girls and was fully immersed in a country that's all in Korean
she grew up speaking Korean at home, but i can imagine English is what she spoke the most when just being out and about in Burbank so that's just what she was most comfortable with in more social situations that didn't involve her family
so when she first got to Korea and started hanging out with the girls, she'll be explaining something while very excited and just forget that they don't speak English. and she's just going on and on until she looks at their faces and the utter lack of comprehension she finds there is what makes her realize they aren't catching anything
or Mira will ask her a question and she responds completely in English without thinking about it and Mira's just like "Zoey. babes."
of course, after the multiple years of being in the group, it happens less and less (she still mainly raps in English bc she's just quicker at it with the added bonus of it sounding cool) but now she just does the thing where she forgets a word or a whole phrase in Korean and just says it in English
"hey, Mir, can you get me the (word in English) from my bathroom?"
"...get the what from your bathroom?"
"the (in English again)...uh, blow...hair."
"(in Korean) you mean the hair dryer?"
"(in Korean) YES, THE HAIR DRYER."
eventually they get to a point where Mira and Rumi have heard Zoey speak English enough to where they're just kinda able to figure out what she's saying based off context but they have no actual grasp of the words
she'll count in English bc it's just quicker for her
and all the USAmerican idioms that just don't translate well into another language
Rumi walks into the studio
"hey, Zoey, what's wrong?"
"it's this song, it's so frustrating. i feel like i'm running around like a headless chicken."
"running around like a headless chicken..."
"i can't figure out what to do next."
"oh...that's such a weird way to say that, what the hell?"