Is there a word for "body language accent" and is there a body of literature on this subject that I could find if I had the right keywords?

I mean things like styles of sitting attributed regionality ("asian squat", "western toilet"), levels of physicality in speech ("gag an italian by handcuffing them"), also things like the way a lot of white American men will have been trained to pitch a ball with a certain posture that reminds you of specifically baseball, or how nearly everyone who went through the Finnish school system has a certain angle to the way they sit. This way of holding oneself and expressing oneself which seems like actually the deepest level of cultural identification for many.