Add Afrikaans to list of languages

[minikitty]

Hi! I've been translations some one shots to Afrikaans for fun in a group I'm in and I would love to be able to post them on Mangadex. I don't know if there's any interest in it from other South Africans or Afrikaans speakers, but I would definitely make use of it as there aren't really any other places that has it as an option.