There are 197 countries in the world we go by in their English name. Some countries call themselves a different name than the one we are used to in their native language. Such as Nihon, Italia, etc. How many can you name?
Source (for the most part): https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_and_their_capitals_in_native_languages
What is so hard about distinguishing then and than? In the quiz description you put then instead of than! For this reason you cannot be considered fluent in English nor have you achieved fluency in English!