As a Slovenian I appreciate the inclusion of Carantanian (slovene) culture in v4.07, but unfortunately the implementation of it is completely wrong. Carantania (Wikipedia link) was a principality that emerged in the 7th century and then came under Bavarian rule in the 740s before becoming part of the Carolingan empire until it was finally dissolved in 828. Carantanian culture shouldn't be a melting pot culture that emerges after 1250. It should exist on the map from the start, primarily as a province culture.
When Paradox decided against including a Slovene culture they used Croatian as a replacement. So the minimum required to properly implement the culture would be to change two characters and several provinces that are currently Croatian.
The two characters (and their IDs) are Jesen Vit (190567) and Grgur Lanik (190568). Both are located in old_frankish.txt rather than croatian.txt where one might expect them. Grgur could perhaps also be renamed to Gregor, since that's the form of that name that is used in Slovene.
The provinces (and their IDs) are Karnten (456), Krain (457), Istria (458), Sopron (450), and Vas (454). The latter three could perhaps be disputed to a degree, but I think slovene is still more accurate than croatian and Croatians still have plenty of other provinces and a kingdom.
Additionally Steiermark (455) and Untersteiermark (1652) ought to start out as slovene rather than german. Historical Carantania proper would be best approximated with the combination of Karnten and Steiermark and given how it lost it's independence in 740s the areas would still be slovene in 796 when the game starts. Steiermark did eventually become German, so I'm fine with it switching culture to Bavarian and Austrian in later starts. The area of the Untersteiermark province remains Slovene to this day though, so for that reason I think it shouldn't change culture in the history files and should remain slovene throughout.
Further, I would recommend naming the culture Slovene rather than Carantanian in the localization. That is because as I mentioned Carntania roughly covered the area of only two provinces (Karnten and Steiermark) and to the south old Slovenes lived in a second principality, Carniola (Wikipedia link). It seems unfair as well as inaccurate to name the culture of both after only one of them, but Slovene would fit nicely for the two of them. It also works better for Sopron and Vas if you decide to change them as well.
Finally, if you want to go the extra mile, Jesen Vit and Grgur Lanik are as far as I can tell both fictional characters, but there was a historical Carantanian prince Hotimir of Borut's dynasty who ruled from 752 until 769. It's not known when he was born, but it is known that he was sent to the Bavarians as a hostage in 745. Hotimir should own both Karnten and Steirmark and should have Elective Monarchy succession. Known rulers before him are his uncle Borut (???-749) and Borut's son Gorazd (749-752).
When Paradox decided against including a Slovene culture they used Croatian as a replacement. So the minimum required to properly implement the culture would be to change two characters and several provinces that are currently Croatian.
The two characters (and their IDs) are Jesen Vit (190567) and Grgur Lanik (190568). Both are located in old_frankish.txt rather than croatian.txt where one might expect them. Grgur could perhaps also be renamed to Gregor, since that's the form of that name that is used in Slovene.
The provinces (and their IDs) are Karnten (456), Krain (457), Istria (458), Sopron (450), and Vas (454). The latter three could perhaps be disputed to a degree, but I think slovene is still more accurate than croatian and Croatians still have plenty of other provinces and a kingdom.
Additionally Steiermark (455) and Untersteiermark (1652) ought to start out as slovene rather than german. Historical Carantania proper would be best approximated with the combination of Karnten and Steiermark and given how it lost it's independence in 740s the areas would still be slovene in 796 when the game starts. Steiermark did eventually become German, so I'm fine with it switching culture to Bavarian and Austrian in later starts. The area of the Untersteiermark province remains Slovene to this day though, so for that reason I think it shouldn't change culture in the history files and should remain slovene throughout.
Further, I would recommend naming the culture Slovene rather than Carantanian in the localization. That is because as I mentioned Carntania roughly covered the area of only two provinces (Karnten and Steiermark) and to the south old Slovenes lived in a second principality, Carniola (Wikipedia link). It seems unfair as well as inaccurate to name the culture of both after only one of them, but Slovene would fit nicely for the two of them. It also works better for Sopron and Vas if you decide to change them as well.
Finally, if you want to go the extra mile, Jesen Vit and Grgur Lanik are as far as I can tell both fictional characters, but there was a historical Carantanian prince Hotimir of Borut's dynasty who ruled from 752 until 769. It's not known when he was born, but it is known that he was sent to the Bavarians as a hostage in 745. Hotimir should own both Karnten and Steirmark and should have Elective Monarchy succession. Known rulers before him are his uncle Borut (???-749) and Borut's son Gorazd (749-752).