There are a lot of Chinese and Korean people who speak English very well.
Lots of Chinese and Koreans are really good at English.
ーThere are a lot of Chinese and Korean people who speak English very well.
「英語がとても上手な中国人と韓国人がたくさんいる。」
〇〇 who speak(s) English very well で「英語をとても上手に話す〇〇」
ーLots of Chinese and Koreans are really good at English.
「多くの中国人と韓国人は英語がとても上手です。」
be good at English で「英語が上手・得意です」
ご参考まで！
カナダ 
