you dont really need background in english language when it comes to music. You can phonetically sing it or use it to speak the words along with the melody. Like I don't know italian or german, but i can sing it to sound natural with practice.
Lemme rephrase that, because i think you might have misunderstood me
I know a great number of the loves project artists are completely fluent in english, some i'm not sure and others i know are not fluent in english, but it feels like the majority of these artists speak fluent english
The artists m-flo has worked with:
out of 39 artists worked with in the loves project, 19 are confirmed to speak fluent english, about 5 i have not confirmed, and i know BoA is now learning
and some of the artists i just cant find info about, but phonetically, singing in english from japanese will come out as engrish.
but back on the BoA topic
The new single sounds really familiar and i cant place a finger on what it reminds me of
but i like it