Game concept
Celebrate Other Cultures Decision
From the game's encyclopedia
A Decision that enables you to improve Development, Control, Building costs, and defensive Advantage in Counties from different Cultures with a Cultural Acceptance of 75% or more.
Taking the Decision will also increase your Prestige Prestige and Levies.
All Counties in the Realm are affected. The Gold cost scales with the number of affected Counties.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Celebrate Other Cultures Decision is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "A Decision that enables you to improve Development, Control, Building costs, and defensive Advantage in Counties from different Cultures with a Cultural Acceptance of 75% or more." It is part of Decision. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.