Culture
Portuguese
set_culture portugueseCulture ID portuguese. set_culture changes the culture of the character you play; change_culture <county id> portuguese 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.
ChivalrySocial+50% Tyranny Gain, +10% Accolade Glory Gain
Fervent Temple BuildersRealm+10% Temple Buildings Construction Cost
Martial AdmirationSocial+2 Number of Knights, +5 Negate prowess penalty, +10% Accolade Glory Gain
Added with a DLC
- Ritualized Friendship with The Fate Of Iberia
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
Other Iberian cultures
Andalusian, Aragonese, Asturleonese, Basque, Castilian, Catalan, Galician, Suebi, Visigothic
Source: game/common/culture/cultures/00_iberian.txt, game/common/culture/traditions/00_societal_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.