Nowdays a lot of Kpop lyrics are written in English or have a lot of English components.
We all know who is the best lyricist in Korean Pop who writes in Korean. However she has no sway in the West because of her complete inability to write English lyrics.
However there are a myriad of Kpop lyricists who write English lyrics, not all of them Korean .
Who do you think writes the best KPop lyrics in English ( Ed Sheeran should not be included since he is a singer in his own right.)