In US films and television, characters with a British accent are typically smart. Characters with a deep south accent are typically foolish or uneducated. And characters with a Scottish accent are typically violent. This has been going on for so long, that audiences don't think "Oh, that character is from England/the South/Scotland" anymore; we understand immediately we should expect the character to be intelligent/stupid/aggressive.
I'm wondering if other major film and television hubs (e.g. Bollywood, Korean soaps) have developed such a system and successfully instilled it in their audiences.
Note: I would imagine that the use of "rural" accents to point to low education is widespread, like the deep south accent in the US, and accents from the Yucatan and northern regions in Mexican films and television. I would like to hear about systems that go beyond this rich/poor, educated/uneducated trope (i.e. systems that routinely use more than two accents).