Culture
Viet
set_culture vietCulture ID viet. set_culture changes the culture of the character you play; change_culture <county id> viet changes a county's. Both need the debug mode (launch option -debug_mode).

Traditions
The traditions this culture starts with, and what each one does.
Added with a DLC
- Scholar Officials with All Under Heaven
- Sinophilic with All Under Heaven
- Rice Cultivators with All Under Heaven
Ceremonious ethos
The ceremony of court life is so integral to this culture that it forms a core part of people's social behavior. A place for everyone, and everyone in their place.
Characters of this culture
Martial custom: Men Only
- Only men can be Commanders and Knights
Source: game/common/culture/cultures/00_viet.txt, game/common/culture/traditions/00_ritual_traditions.txt, game/common/culture/traditions/00_realm_traditions.txt, game/common/culture/pillars/00_ethos.txt, game/history/provinces (counties at the start) and the English localisation, Crusader Kings III 1.20.0.3.