Maybe you've mastered all of the countries of the world in English, but what about in their native languages? Whether a veteran of the English-language quiz, someone challenging themselves to learn all of the countries of the world, or if you find yourself somewhere in between, how many countries of the world can you name in their native languages?
Given that English is one (often, one of several) official languages in many countries throughout the world, a number of English names work for this quiz. There are also a number country names that have never had an alternative English name (especially in the so-called New World). If one were to enter country names in the same way that one would do in the original Countries of the World Quiz, they would end up with ≈106 countries. That leaves ≈90 more countries with official names that sometimes bear little-to-no resemblance to their English names.
All official languages are valid for each country.
Transliteration (equivalent names in Latin letters) is sufficient.
Nice quiz, but there are some inconsistencies. Please accept the short form for Gabon, the way you do for other countries (e.g. instead of Republica Argentina -> Argentina). And please also accept Marshall Islands, they have English as a co-official language.