Culture
Serbian
set_culture serbianCulture ID serbian. set_culture changes the culture of the character you play; change_culture <county id> serbian 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.
Konni RaidsRegional+20% Skirmisher Screen, +20% Light Cavalry Damage, +20% Light Cavalry Screen, -10% Retreat Losses, …
Religious PatronageRitual+25% Monthly Piety from Buildings
Stalwart DefendersWarfare+5 Defender Advantage, +5 Controlled Territory Defender Advantage, +15% Nomadic Horde Toughness
Added with a DLC
- Staunch Traditionalists with Hybridize Culture
Communal ethos
This culture values the bonds of community above all else, fostering great loyalty and dedication by working together towards common goals.
Characters of this culture
Provinces of this culture
- Herders have a higher County Fertility Growth
Martial custom: Men Only
- Only men can be Commanders and Knights
Other South Slavic cultures
Source: game/common/culture/cultures/00_south_slavic.txt, game/common/culture/traditions/00_maa_traditions.txt, game/common/culture/traditions/00_ritual_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.