mores

US /ˈmɔːr.eɪz/
UK /ˈmɔːr.eɪz/
1.

mœurs, coutumes, conventions

the essential or characteristic customs and conventions of a community

:
The traditional mores of the tribe were strictly observed.
Les mœurs traditionnelles de la tribu étaient strictement observées.
Changing social mores have impacted public opinion.
L'évolution des mœurs sociales a eu un impact sur l'opinion publique.