I believe that there is a lowest common denominator for accented English, and it sounds like “sung” English - which sounds like non-regional American English if the singer is singing and doesn’t naturally have a very pronounced accent. This is partially due to cultural effects but partially due to the mechanics of speaking with an accent.
By “lowest common denominator“, I mean omitting affectations like non-rotic R (Boston) and dropped g (urban) and exaggerated length of selected vowels (US southeast) and constant syllable length and other kinds of things. There are lots of videos on YouTube about how accents work.
But mainly phonetics is about eliminating silent letters, using the most unambiguous letter when there is a choice (eg K or S instead of C), etc.
Anyway I’m rambling but you probably get my point.
By “lowest common denominator“, I mean omitting affectations like non-rotic R (Boston) and dropped g (urban) and exaggerated length of selected vowels (US southeast) and constant syllable length and other kinds of things. There are lots of videos on YouTube about how accents work.
But mainly phonetics is about eliminating silent letters, using the most unambiguous letter when there is a choice (eg K or S instead of C), etc.
Anyway I’m rambling but you probably get my point.