Implemented
Celtic Cultures: Irish, Scottish,Pictish, Welsh, Breton
Added Briton, Gallic, Belgic, Cantabrian, Galician, Lusitanian, and Celtiberian cultures. Each of these has its own associated kingdom.

Example of what i will be doing when i have free time

CK2
Latin Cultures: French, Norman, Italian, Occitan, Roman

EU4 added
French Cultures: Aquitaine, Burgundian, Cosmopolitaine, Gascon , Norman, Occitain, Wallonian
Italian Cultures: Lombard, Maltese, Sicilian, Umbrian

Ideas:

Latin Cultures: didn't there used to be and outrunner culture that was Latin when the crusader kingdoms get set up in the middle east?

Ck2
West Germanic: English, Anglo-Saxon, Saxon, Frisian, Dutch
Central Germanic: German, Lombard, Frankish, Suebi
North Germanic: Norse, Swedish, Norwegian, Danish

EU4
British: English
Germanic: Austrian, Bavarian, Dutch, Flemish, Hannoverian, Hessian, Pomeranian, Prussian, Rheinlaender, Saxon
Scandinavian: Swedish, Norwegian, Danish

Ideas: well to start your own Danelagh Culture mode, there was a guy who came up with norse interaction with Celtic called Norse-Gael though that might be more of an idea for the celtic invasion of Scandinavia http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=428847635&searchtext=culture

Ck2
Iberian: Basque, Castillian, Catalan, Portuguese, Visigothic,
Eu4
Iberian: Andalusian, Aragonese, Basque, Castilian, Catalan, Galician, Leonese, Portuguese
Ideas:

Ck2
Byzantine:Armenian, Greek, Alan, Georgian,
Eu4
Byzantine: Gothic, Greek
Caucasian: Armenian, Circassian, Dagestani, Georgian
Ideas:

Ck2:
East Slavic: Russian, Ilmenian, Severian, Volhynian
West Slavic: Pomeranian; Bohemian, Polish
South Slavic: Croatian, Serbian, Vlach, Bulgarian,
EU4
East Slavic: Byelorussian, Russian, Ruthenian
West Slavic: Czech, Polish, Schlesian
South Slavic: Albanian, Bulgarian, Croatian, Romanian, Serbian
Ideas:

Nice idea I like it. I'm pretty much focusing on what I'm working on in the moment. I'm doing English and French cultures, which will have a specific dynamic that will differ from the Celtic one. Much of the culture stuff will be closely related to the Angevin Union.

German:

Frankish break-off in Northern France. Goth break-off in southern Poland/northern Hungary. Teuton break-off in where the Teutonic order was historically. Geatish break-off in Southern Scandinavia. Germany will be divided like it is in EU4 Common Sense.

Idea for the Greeks in egypt http://en.wikipedia.org/wiki/Ptolemaic_Kingdom you can all so look at the other Hellenistic kingdoms for cultures

CK2
http://www.ckiiwiki.com/Culture#Summary
EU4 added
http://www.eu4wiki.com/Culture
Ideas


Finno-Ugric
CK2
Finnish
Lappish
Estonian
Komi
Khanty
Samoyed
Mordvin

EU4 added
Ingrian
Karelian
Ostyaks
Sami
Uralic

Ideas

Baltic
CK2
Lettigallian
Lithuanian
Prussian

EU4 added
Latvian?

Ideas

Altaic
CK2
Turkish
Pecheneg
Cuman
Khazar
Bolghar
Avar
Karluk
Kirghiz
Mongol

Eu4 added
Chahar
Khalkha
Khazak
Kyrgyz
Oirat
Uyghur
Uzbek

and here a massive list of cultures that are free to use as long as you give credit as too who did the research or modding or something. (just read carefully)

https://forum.paradoxplaza.com/forum/index.php?threads/new-cultures.610605/

I had problems registering my game, I can't view that page.

ah ♥♥♥♥... okay i'll get what info from there over here that i can but i want to help you get that problem fixed, that place would be a great help to you, so what the problem?

I registered in under another account that I can't seem to connect to.

i'm going to assume that using your email to have them send you the account names and create a new pass word been done... i have no idea...

and after review of that list the only thing useful about it was the melting put cultures as it shows examples on how it can be done.

melting pot
Surfranco, french and castilian, the three Spanish kingdoms area,

Scots Gaelic, kingodom of Saxony area Celtic

Norse-Wendish
Norse-Finnic
greco-norse
anglo_irish

really i just found this page on wikiapedia http://en.wikipedia.org/wiki/Proto-Indo-Europeans

and i'm going to see what it turns up.

Germanic
http://en.wikipedia.org/wiki/Crimean_Gothic
Crimean
http://en.wikipedia.org/wiki/Yola_language
Ireland
http://en.wikipedia.org/wiki/Fingalian_language
Ireland
http://en.wikipedia.org/wiki/Gothic_language
walcahia ruthingia
http://en.wikipedia.org/wiki/Vandalic_language
north Africa
http://en.wikipedia.org/wiki/Burgundian_language_(Germanic)
Poland
http://en.wikipedia.org/wiki/Bastarnae
Hungary
http://en.wikipedia.org/wiki/Heruli
Croatia
http://en.wikipedia.org/wiki/Rugii
so let me get this straight the pomerians were Germanic in nature yet there Slavic in CK2... just weird
http://en.wikipedia.org/wiki/Silingi
Bohemia

Pomerania was Germanic early on, then Slavic tribes entered Poland and eastern Germany after the Huns pushed back the Germans. The Germans started resettling those lands (Pomerania, Danzing, East Prussia) during the Holy Roman Empire and the Teutonic Order.