That's going to confuse people even more. Maybe you should just change the name of the quiz to "EuroVision Countries in Alphabetical Order?" The Caucus countries, Cyprus, Turkey and Kazakhstan are arguable- but I don't think anyone considers Israel to be in Europe.
Kosovo never participated. Morocco is missing. Also when it says no former countries are included, it is a little misleading because some people might think that means that countries that don't participate anymore don't count either. Overall, is fairly well done and doesn't include any major mistakes.