There is a wiki.

https://en.wikipedia.org/wiki/Eating_utensil_etiquette

Edit: The wiki on chopsticks has an etiquette section broken down by country.

https://en.wikipedia.org/wiki/Chopsticks#Chopstick_customs,_...

  The difference between the American and European styles has been used as plot point in fictional works, including the 1946 film O.S.S. and the 2014 series Turn: Washington's Spies.[5] In both works, using the wrong fork etiquette threatens to expose undercover agents.