rite_is_syncretic_with

rite_is_syncretic_with = {
	$RITE$ = {
		trigger_if = {
			limit = { rite_has_parameter = unreformed }
			prev = { rite_has_parameter = unreformed_syncretic_actor }
		}
		trigger_else_if = {
			limit = { faith = { religion_tag = christianity_religion } }
			prev = { rite_has_parameter = christian_syncretic_actor }
		}
		trigger_else_if = {
			limit = { faith = { religion_tag = islam_religion } }
			prev = { rite_has_parameter = islamic_syncretic_actor }
		}
		trigger_else_if = {
			limit = { faith = { religion_tag = judaism_religion } }
			prev = { rite_has_parameter = jewish_syncretic_actor }
		}
		trigger_else_if = {
			limit = { faith = { is_in_family = rf_eastern } }
			prev = { rite_has_parameter = eastern_syncretic_actor }
		}
		trigger_else_if = {
			limit = { faith = { is_in_family = rf_sinitic } }
			prev = { rite_has_parameter = sinitic_syncretic_actor }
		}
		trigger_else = {
			always = no
		}
	}
}

As written in game/common/scripted_triggers/00_religious_triggers.txt.