Further, for nations such as the Seleukids, there is still an entry for SEL and "Seleukid Empire" as well as a SEL_DYN name in the localization files. retrieve_nation_localization needs to check country_name={name=""...} in the save file as well so it checks for cases where the tag has changed its name.
Further, for nations such as the Seleukids, there is still an entry for SEL and "Seleukid Empire" as well as a SEL_DYN name in the localization files. retrieve_nation_localization needs to check country_name={name=""...} in the save file as well so it checks for cases where the tag has changed its name.