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lingua franca noun

  /ˈlɪŋ.ɡwə ˈfɹæŋ.kə/
  • A common language used by people of diverse backgrounds to communicate with one another, often a basic form of speech with simplified grammar, particularly, one that is not the first language of any of its speakers.
ли́нгва-фра́нка, о́бщий язы́к, язык общения
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