They’re fluent in multiple languages
The members of BLACKPINK come from a variety of backgrounds. Most of them can speak English fluently. They all can speak Korean and Japanese.
“Three of BLACKPINK’s four members — Kim Jennie, Park Chaeyoung, and Lalisa Manoban — speak English fluently. The fourth member, Kim Jisoo, does not, but she does speak Korean, Japanese, and Chinese.” -TIME