T–V distinctions, named for the Latin "tu" and "vos" (singular and plural versions of "you"), is the name given to the phenomenon when a language has at least two different second-person pronouns. The varying usage of these pronouns indicates something about formality, familiarity, and/or solidarity between the interactants. So, for example, the T form might be used when speaking to a friend or social equal, whereas the V form would be used speaking to a stranger or social superior. This phenomenon is common in European languages.