natural language

/N AE1 CH ER0 AH0 L L AE1 NG G W AH0 JH/
noun
  1. 1

    (retronym) Any human language that has evolved naturally in a community, usually in contrast to computer programming languages or to artificially constructed languages such as Esperanto.

    It'll be a long time before computers understand natural language.

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Source: https://en.wiktionary.org/wiki/natural%20language