The author who writes dialect as an insider, as a native speaker, but who faces the disadvantages of being a POC outsider in the publishing context, needs a different answer concerning How to Use Dialect Well in Fiction than an author writing from the opposite condition. In other words, this essay could consider the needs of white or POC writers, but not of both and still be brief.
I’m Black American, while you may identify as biracial, Desi, or Chicanx. You may not be American at all, but instead multilingual and living in Sri Lanka, Brazil, or France. The term “person of color” obviously can’t do real semantic justice to such a zigzagged bounty of backgrounds. It’s a nonce-word that’s stuck around too long, but I don’t have anything better. Who and wherever you are, I ask that you translate and imagine as necessary when I speak from my particular black experience.