I HAD TO SHARE THIS
So it turns out the possible reason on why Zoro calls Sanji "kokku" in japanese is not because he is saying "cook" but with a wrong pronunciation. It's posible he says it because the word for a ship's chef in french is "coq", which could be pronounce as "kokku" too.
I'M JUST SAYIN'
Another alternative to this is "maître coq".











