For Shakespeare, the mastery of languages, speech, and rhetoric is closely aligned with authority and control. Early on, Henry IV Part 1 establishes freedom of speech as a powerful tool of rebellion and resistance to authority, especially for Hotspur. Yet, it becomes clear throughout the play that Hal's capacity for language acquisition establishes him as a man fit to rule, whereas Hotspur's lack of rhetorical control and disdain for foreign speech reveals him to be an unfit leader. At times, language is associated with manipulation, deceit, and effeminacy, but, as in all Shakespeare's work, language is ultimately synonymous with power. The play also famously portrays a broad spectrum of language as it covers various regional and class dialects spoken in England and Britain
In Henry IV Part 1, one's ability to master and control language and speech is a marker of one's ability to lead and govern the kingdom.
Henry IV Part 1 is interested in Britain's linguistic diversity and portrays various regional and class dialects.