Gender
Merriam Webster officially recognized the pronoun "they" as a singular use pronoun in 2019.  According to the dictionary, the word had actually been used as a non-gender binary pronoun since the 1300s.  Around the time Merriam Webster made this announcement, artist Sam Smith announced that their correct pronouns were actually they/them.  Typically, for those who identify as female, the correct pronouns are she/her, and for males, he/him.