“Lingua franca” in Japanese
Short answer
Lingua franca in Japanese is “媒介語” (baikaigo). Full meaning: lingua franca, vehicular language, bridge language, intermediary language.
Other ways to say “Lingua franca” in Japanese
リンガフランカ
ringafuranka lingua franca, bridge language
共通語
kyoutsuugo common language, lingua franca; standard language (language variety understood throughout a country)
共通言語
kyoutsuugengo common language, lingua franca
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