General Information
Auvergne is a French duchy that is not playable. The mod files say that it should exist from 849 to 866, where it is annexed by 
Aquitaine, but due to the lines starting with hashes, it isn't added.
See also: 
France, 
France, 
West Francia, Aquitaine
Decisions
Form 
French nation
Potential Requirements
- Playing with normal or historical nations
- If AI-controlled:
- Is not playing a custom nation
- Is not a former colonial nation
- France does not exist
- France does not exist
- Is not Holy Roman Empire, France, France, Papal States or Spain
- Primary culture is either Basque or in the French cultures group
- Is not a colonial nation
Requirements
- Is not at war
- Is not a subject nation
- Is not a steppe horde
- France does not exist
- Owns core provinces Maine, Berry, Vermandois, Paris, Orleanais, Nemours and Champagne
Upon enactment
- Country becomes France
- If not elector of HRE, any owned provinces is set out of it
- Government rank set to Kingdom if Duchy
- France gains permanent claim on the French region
- Gain country modifier "Increased Centralization" for 7300 days:
- -0.05 Monthly autonomy change
- +1 National unrest
- 25 prestige
- Changes capital to Paris
French Ducal Ideas and Traditions
Traditions:
- Fort maintenance modifier: -10%
- Cavalry cost: -10%
Ideas:
- Men of Trade: Domestic trade power +10%
- Renaissance Palaces: Presige decay -1%
- Qui Ruit Et Lethum: Infantry combat ability +10%
- Religious Conviction: Tolerance of the true faith +2
- French Cuisine: Yearly prestige +1
- French Enlightment: Diplomatic relations +1
- La Petite Nation: Morale of armies +20%
Ambitions:
- Global tax modifier: +10%