I’ll add the Wikipedia entry is spot on, in Bulgaria a nod means no and a shake means yes, well unless they know they are dealing with a non local so the opposite applies well maybe.
Arun (my Indian friend) advised me he’ll be joining this site tomorrow to report the thread so no need
Seems a bit extreme when you could simply report it on his behalf if he feels that strongly about it.
Given the amount of confusion on here it might be more productive and educative if he were to come on here and explain his point of view. Inform the debate etc etc.