"Because we haven't used the franc for 20 years" or "Because we haven't used the franc since 1999" to slightly correct the English there, although of course what Gebb said is instantly understandable.
"Name a country who uses an official currency with that name." It doesn't say anything about issuing currency in there. If that were the case, Ecuador, El Salvador, and Palau wouldn't count for "Dollar."
Are countries like El Salvador or CAR really using Bitcoin? I highly doubt most people in the CAR, a country where only 3.5% of people have internet access (according to Wikipedia), have heard of Bitcoin, let alone used it.
I was interested in this as well so I looked it up. For both countries it is an official 2nd currency by political decision. Supposedly a third of the population of El Salvador used it 3 weeks after its implementation in mid 2021 but a year later had hardly and usage because people only used the start capital they got in the official cyberwallet app and the countries plans to mine coins themselves hasn't come through. As for CAR there's not a lot of info, the implementation is still quite recent. According to Wikipedia about every 10th person has access to the internet.
Yuan/Yuen/won are essentially the same unit of currency. They are cognates from Chinese characters(hanzi in china, hanjia of Korea and Kanji in Japan)圆. The different romanisations reflect the different pronunciations of Chinese characters in the three languages
This was a fantastic quiz-- thank you. I've been learning currencies from different smartphone quiz apps, and this helps reinforce that. I disagree with people saying you should change the quiz, I think krone and krona should be lumped together.
https://www.jetpunk.com/user-quizzes/1320535/name-a-valid-country-currency
https://www.jetpunk.com/user-quizzes/1320535/name-a-valid-country-currency