Culture
Goguryeo
set_culture goguryeoCulture ID goguryeo. set_culture changes the culture of the character you play; change_culture <county id> goguryeo 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.
Martial AdmirationSocial+2 Number of Knights, +5 Negate prowess penalty, +10% Accolade Glory Gain
Warriors by MeritWarfare+2 Prowess per Level of Fame, +10% Accolade Glory Gain
Added with a DLC
- Cultural Primacy with All Under Heaven
- Sinophilic with All Under Heaven
- Fortress Mastery with All Under Heaven
Bellicose ethos
This culture considers conflict and violence to be necessary states of existence; ingrained in its people is the idea that one should stand up and fight for their own.
Martial custom: Men Only
- Only men can be Commanders and Knights
Cultural men-at-arms
Regiments unlocked by innovations only this culture's heritage can research.
- Rocket Carts · innovation
Other Buyeo cultures
Source: game/common/culture/cultures/00_korean.txt, game/common/culture/traditions/00_societal_traditions.txt, game/common/culture/traditions/00_combat_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.