Types of pronoun:
Pronouns can be divided into personal pronouns and impersonal pronouns, and from there into multiple types: possessive pronouns, demonstrative pronouns, interrogative pronouns, etc. Any word that meets all of these requirements is probably a pronoun:
1) Answers the question "who" or "what"
2) Is not capitalized (except at the beginning of a sentence)
3) Cannot be used with an article (except for possessive pronouns, which include an article, e.g., le mien)
Related lessons: French pronouns - Parts of speech
Related terms: noun - agreement - personal pronoun - impersonal pronoun