As a general rule: respect the language that people use to describe themselves,

As a general rule: respect the language that people use to describe themselves, and be aware that language changes over time (what’s acceptable language today may not be acceptable five years from now!)
Use “person-first language” whenever possible – for example, “a man with epilepsy”, rather than “an epileptic man”
Avoid using adjectives as nouns when describing groups of people – for example, instead of writing “drug users”, write: “people who use drugs”
Use specific labels rather than general labels, when possible. For example: “Korean Americans” rather than “Asian Americans”
When describing differences between groups of people, focus on relevant qualities to what you are writing about. For example: if you are writing about sex chromosome-linked illnesses, study participants’ biological sexes are probably relevant, while participants’ sexual orientations are probably not
Use “they” as a singular pronoun, and use “they” when a person’s gender is unknown or irrelevant
For example, instead of writing “he or she”, use “they” instead
Do not anthropomorphize language (apply words we would use for humans to non-humans)
For example, use “that” and “which” when referring to animals or objects, rather than “who”