I have some ideas that I was gonna roll off theres a lot so sorry for the long post but bear with me haha
1. Saw peoples opinions on the name changes and I agree with a lot of them but I did find a way to make a use of the mechanic without making things to confusing
First limit it to at the highest duchy level locations, possibly kingdom if it really is pertinent.
Second with that limitation to duchy's at most make the cultures be restricted to only plausible aka no German Athen for Athens a more elaborated example of this would be England:
As we know during the timeline of CK2 there are a lot of different cultures on the British Isles most who at varying points or another had different levels of control on the areas.
to represent this allow name changes for only those cultures relevant to the area with the example I'm using of London
English: London - This one we don't have to add to the list because it's the standard localisation for the english speaking game
Norman: Londres - Since Norman is a variant of French I am presuming to a degree that Normans would have called London similar thus when they hold it becomes Londres.
Saxon: Lunden - This one is a bit optional I guess
Welsh: Llundain - Never controlled London after being pushed out by Saxons but plausible with right player or lucky AI
Scottish: Lunnainn - Since at this time Scottish was Scottish Gaelic I included it in this example but I guess we could also leave it out of the list of plausibles
Irish: Londain - Irish in same situation as Welsh
Danish/Norwegian/Swedish: London - Since it's exact same as English doesn't need to be added.
Thus you can essentially go around the different regions look at who has the potential to take an area and rename it around that. Some areas like most likely Germany will have only one plausible culture there and thus will remain stagnant name others like Sicily, the Levant, England will have different cultures at different times making it realistic to have changes
Some ideas on which are plausible cultures for regions:
Scandinavia: Obviously just the three nordic cultures maybe Finnish as well?
France: Norman, Breton, Frankish, and Occitan. For Eastern provinces along edge of HRE German
Hispania: Portuguese, Andalusian Arabic, Catalan, and Spanish
Italy: Italians, Sicilian, Greek, Norman(For the brief Norman sicily era) and maybe German in the case of a HRE that is strong and can control Italy for a long time
Levant:Arabic, Latin cultures, and Greeks
Greece/Anatolia:Turks, Greeks, Latin cultures
thats all of my two cents on the naming debacle.
2. Having perhaps unified cultures for when you form an empire? Like forming the British empire title will create a British culture that slowly spreads, Scandinavians get Scandinavian/Norse, Spain gets Spanish, Francia goes from Frankish to French, Roman Empire(If this possible) gets Latin.(Although if the Byzies do it then nm they'd likely want it Greek)
unlike idea one this one is a more longshot idea so not really much more to say haha.
3. Changing name of Sicilian culture in the Greek culture group to Griko? An actual ethnic group that exists in Southern Italy heres a link
http://en.wikipedia.org/wiki/Griko_people, my idea on this is it makes southern italy more interesting and a bit more accurate then the current setup of having everybody be sicilian down there(Even if they get the different colors to say they are in a different culture group.)
4. Arab-Sicilian culture in case Normans get lazy and don't conquer Sicily the island or a player plays as them and conquers Southern Italy?
5. Anglo-Norse culture maybe for the case of a Norway victory against Harald and William the Conqueror? This is another kinda eh idea I had cause in a lot of ways I'm sure the norse would prefer that the culture becomes just norweigan.
and thats all I can think of
