Folk music and country music are distinguished in the U.S. People like John Denver and early Bob Dylan are folk music, but country music has some specificity to it, and most of it seems to involve twangy guitars played poorly. And they over enunciate their southern accents, when music often gets rid of accents because of the harmonies you're singing. IE, you can't really tell Adele has the accent she has, when she sings, but country singers make sure you know they're good old boys from the South of the U.S.