This refers to a person's internal sense of being male, female, neither, or both, regardless of their biological sex. Gender identity can influence language use and perception, as certain words, phrases, and expressions may be perceived as more or less congruent with one's self-identified gender. For example, transgender individuals may prefer to use pronouns, nouns, and verbs that match their gender identity, even if they don't align with their biological sex or societal norms.