What do you call culturally specific virtues?
Solution 1:
(singing) When our habits are strange and our customs deranged, that's our mores. (singing off)
I think the word you want is mores (pronounced moh-rays), defined at M-W as:
the fixed morally binding customs of a particular group
Examples of mores include that in some cultures one must engage in some small talk in order to create a sense of comfort before getting to business, while in others such talk would be taken as wasting each other's time and therefore rude. Another example might be whether to bow, shake hands, or kiss on the cheek upon greeting.