If you do not know someone's pronouns, do not use any. When writing about an unspecified person, it is usually possible — and always preferable — to structure a sentence in a way that avoids gender.

The indefinite pronouns algún and ningún need to agree in gender (when possible) and in number with the noun they are substituting. Algo and alguien are not gender or number specific. algún ...

Twenge of San Diego State University and a team of researchers. The rise of the singular pronoun and the decline of the plural are consistent with what has been described as an increasing level of ...

Pronouns are used to refer to people by replacing proper nouns ... of gender codified in the English language and have had to find or create alternatives to identify themselves in speech and writing.

as a singular pronoun used by people whose gender is non-binary. The expanded usage sits alongside embiggened definitions for "inclusive" and "colorism", as well as new entries for pop culture ...

John McWhorter to the rescue! This week the Columbia University linguist publishes a witty book called “Pronoun Trouble: The ...