No south africa? Lol but taiwan is. This quiz is a joke. Get a source next time and show it in the quiz. Now it just looks like you came up with random stats. And South Korea is in this list but not Czechia or Croatia or Portugal.
Sources are from government censuses. South Africa is 31%, Portugal is 27%, Czechia is 27%. It's possible that the sources are outdated now. https://en.wikipedia.org/wiki/List_of_countries_by_English-speaking_population, https://en.wikipedia.org/wiki/English_language_in_Europe