This. I was born in KY, mostly raised in the south and southwest as a child and thought I could at least basically understand any cracker I ran across until I met old Uncle Calvin from the panhandle who might as well have been speaking Etruscan. Then we came up here to NH which was a whole 'nother story. Hiwaiya! HafaBeeyah! Itzindacah,opendado-wa, itzondaflo-wa. AndthenCameeeYah! JeeeezumCrow! This was a rural lakes-region accent of the 60's, like the Boston cant but infantilized and opened up so consonants were almost impossible. Not everyone spoke like that but a lot of my neighbors did and were almost imposible to understand.