Some aspects of non verbal communication are universal. We can all read emotions and know how to react to them. If someone is angry, best to leave them alone. If someone looks happy, they are very approachable and you can talk about a lot of different things. But what about less universal things? What is the “I don’t know” gesture in your country? It can change a lot country to country. Check out this video where Gad Elmaleh talk about French body language.