If you’re into metal, here are a few bands renowned for mixing cultural music with heavy metal off the top of my head:
Norway - Ulver (They have possibly the most varied discography in all of music, but their first album is a mix of black metal and Norwegian folk music, and their second is entirely Norwegian folk music)
Brazil - Sepultura (From Arise to Roots they started incorporating a lot of Brazilian musical ideas)
Romania - Negura Bunget (They’re the only reason I know what a nai is)
Just look at Spotify’s Car Thing.