language game

A language game (also called secret language or ludling) is a system of manipulating spoken words to render them incomprehensible to the untrained ear. Language games are used primarily by groups attempting to conceal their conversations from others. Some common examples are Pig Latin, which is used all over the globe; the Gibberish family, prevalent in the United States and Sweden; and Verlan, spoken in France.
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A language-game is a philosophical concept developed by Ludwig Wittgenstein, referring to simple examples of language use and the actions into which the language is woven.
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Wittgenstein 's term.  The term is used in several related senses.  A primitive language game generally refers to one of Wittgenstein's thought experiments in which we imagine a tribe of people with very minimal and primitive language.  Often the term is used to refer to a somewhat bounded rule-governed sub-segment of ordinary language. Sometimes it is used to refer to the whole of an actual language. Click here for a fuller account of the concept of language-game.