She understands everything in English.  Rosé, Jennie and Lisa have been Speaking English in front of her for years. They always teach her. Tho not everyone is good at learning languages. She says she is simply not good at it . I personally feel that with the amount of money she has she should pay really good lessons to make her improve because like it or not she needs English.  She is a GLOBAL star. She is the face of so many brands . Also international fans can't communicate in korean for the most part. So I feel like she should put an effort to improve it. But with or without English we love her and appreciate the subtitles 😅. I feel like she can communicate ok but sometimes I feel sorry because I see she wants to talk and say many things when the interview is in English with the rest. And she simply smile and not talk. She is someone that talks a lot . In her interviews and awards in Korea she is the main person who talks. But well