slang - vocabulary not appropriate to the standard form of a language or to formal contexts, jargon - vocabulary used in special ways by particular groups of people, fluent - able to speak the language easily and at natural speed, accurate - using a language correctly or exactly, native - relating to the language you grew up speaking, foreign - characteristic of another country or countries, aquire - learn without needing to try hard, pick up - learn by listening/watching other people, standard language - a variety of language that is used by governments, in the media, in schools and for international communication, benefit - an advantage or profit gained from something,

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