I’ve also seen the “how are you” thing described in comments unfold.
A Hindu pm had the habit of sitting next to developers while they worked, sometimes putting a hand on their knee. After being politely explained that the size of an Estonian personal space is measured in astronomical units and that this was the reason devs literally scattered upon his approach, he immediately changed his behavior and became great friends with the team.
A US lady came to hr complaining about an Ukrainian dev approaching them inappropriately during a party. The hr-person, having witnessed the situation, explained that this was just their way of showing friendly interest and no disrespect was intended. A while later, a Japanese guy came to the hr person complaining the original lady from us had hugged them. Again, it was explained that this is just what Americans do.
Cultures are hard and take a lot of mutual respect to work through.