you mean it's a great example of how something real can become a concept? Like we say "it was a bloody Sunday" to generically mean a massacre. "Lingua franca"

you mean it's a great example of how something real can become a concept? Like we say "it was a bloody Sunday" to generically mean a massacre. "Lingua franca" was a language, did you know that? > That phrase is as English as the word tomato today. It has been at least since the XI century. Long before tomatoes were a thing in England. > English is the most international language in the world Which English? Because British and American English aren't. And probably right now Mandarin Chinese is even more business oriented than English.