Indonesian

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Etymology

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bahasa (language) +‎ dagang (trade).

Noun

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bahasa dagang

  1. (linguistics) koine, lingua franca, link language, trade language, vehicular language: 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.
    Synonyms: basantara, lingua franca, bahasa perantara, bahasa pasar

Further reading

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