I think it has to do with the cultural differences in workplace basically the body Language/ etiquette of different cultures, their habits etc.
one classic example is sitting wiht your legs put cross resting on each other is the custom in middleast but in middleeast its not auspicious they think the person is not open and prefer to sit with legs apart.. same way looking directly into the eyes while conversing also has different meaning in diffrent cultures..

Again other point can be related to a.dressing, b. dining styles
c. cuisine, d.socialising, e.way of greeting people etc