It wouldn't accept China or Hong Kong. What about Papua New Guinea? Also, parts of France were under English rule, but I'm not sure if you are going that far back.
I forgot to set the quiz to accept this and will change the quiz to accept both China and Hong Kong as answers. Also I will put Papua New Guinea on this quiz, it wasn't on wikipedia so I forgot about it.
It'd be better if some of the Caribbean islands showed up by simply typing "Saint Vincent" vs "Saint Vincent and the Grenadines" because there's no way the person doesn't mean that country