During the press tour for the 2018 film "Burning", Choi interpreted for director Lee Chang-dong. She met Bong Joon-ho in April 2019 when she was asked to interpret for one of his phone interviews, and accompanied him at the 2019 Cannes Film Festival, where his film "Parasite" won the Palme d'Or. Choi continued as Bong's interpreter throughout the 2019–2020 film awards season, including at the 77th Golden Globe Awards, the 72nd Writers Guild of America Awards, and the 92nd Academy Awards. In May 2021, she interpreted for Bong as he presented the award for Best Director at the 93rd Academy Awards.