@Update to 1.3.*
+ Swiss
~ Modern Korean renamed to Goryeo
~ adjusted for new or changed cultures of 1.3

Fix:
Romance now has the francophone trait too as intended

Europe:
+ Romance
India:
+ West-Aryan
+ East-Aryan
+ Hindustani
+ Indo-Aryan
+ Dravidian
+ Indian
Africa:
+ Western African
+ Eastern African
+ Central African
+ Southern African
+ Sub-Saharan African
Oceania:
~ Malayan now includes Malagasy as an optional
Middle-East:
~ Arabian renamed to Arab
@Mechanics
+ Optional Game rule to let the AI form a subset of rather immersive Syncretic Cultures
+ Debug Menu: Appears after a country has activated a Syncretic Culture journal entry. Lets you trigger additional yearly events, the 30/50/70 yr milestone events or to convert all pops at once in case you are experiencing general pop fragmentation issues or want to set AI Syncretic Cultures to 100% for what ever reason. You can also hide this debug decision based on personal taste. An event to re-add a primary after forming a new country or to check if new valid homelands have joined your nation is not included here as the yearly check takes care of those already.

Europe:
+ Austro-Hungarian
+ Caucasian
Middle-East:
+ Iranian
Indochina:
+ Tai
+ Modern Burmese
Africa:
+ Ethiopian
Indonesia:
+ Malayan
Polynesia:
+ Polynesian
East Asia:
~ Chinese (Manchu removed as primary, moved to optional, added others as optional)
An exhaustive list of the primary and optional cultures is available on the GitHub page