In addition to food, there is one culture apart from food culture that identifies nationality of each one which is the style of eating. I think sometimes why we have to differentiate it since it is just to put the food into your mouth and chew, but that is what we call “cultural difference”.
From the Stone Age, human start to eat their food with their own hands along with human development, when compared to Thais in previous days, there isn’t much change but to add more about more manners as they had set a table for eating rather than eat from trees and as Thais always not have a talking between since it is rude.
Also China, they have chopsticks as a sign for eating like when you see this it links to the signature food which is noodles and also they like to raise their legs on the chair and talk with mouth chewing to show the close relationship between others around the table, though it may be disgusting for other nationalities, it is their culture.
Another country with a deep manner of eating is Japan; there was a neat from start to finish like before digging in the food there has a sentence or a tell to the people in the table that you’re going to eat it or even when you finish. They also use chopsticks like Chinese but more neatly like eating noodles of Japan or “Ramen”, every time they had finished the dishes, they will carry it on and drink the soup from the bowl.
To look at western culture, there was a practice in eating manners especially in royal family or riches as they use aprons lying on their laps and have the means in using spoon, fork, or knife like a small spoon using with coffee only or desserts and chewing with the lowest sound you can make and have a hardly conversation between the meal, they will wait until dessert or tea served, so that’s when the talk or chat start.
Right now since there were influences from countries to countries, people start to eat different kinds and nationalities of food, it leads to the means of eating that those means are widely well-known the same as the food as one kind of Japanese food like sushi, and it is weird when having lunch in Japanese restaurants and eating them with spoon and fork or eating rice with chopsticks.