https://www.musical-u.com/learn/singing-in-english-tips-for-esl-singers-and-coaches/
From Mexico to Japan, the amount of international performing artists that are singing in English might surprise you.
Although time and regular practice can allow ESL singers to become proficient in a non-native language, learning how to sing without an accent can be incredibly challenging and even costly.
One of the best ways to efficiently maximize an artist’s financial resources is to invest in a vocal coach that has experience working with international students.
https://www.musical-u.com/learn/singing-in-english-tips-for-esl-singers-and-coaches/