Couple of addendums:
1) The Polish Containment Zone is nominally occupied by the Holy Roman Empire and Kievan Rus' respectively
2) The Kingdom of Asturias is an entirely Latin speaking, Catholic theocratic state
3) Every country in this map is Catholic, with the exception of the Kalmar Union (Protestant), the Empire of Greece (Orthodox) and the Land of Israel (Jewish theocracy).
4) The Kingdom of the Franks is Germanic in language and culture
5) Serbia and the Kingdom of Hungary both speak Slavic languages and are dominated by Slavic culture, despite Hungary's Hunnic origins.