We don’t used chopsticks in Cambodia for Khmer food.
Cambodia has had the fork since the latter half of the 19th century.
The interesting is that we don’t put the fork in our mouth, we used it to put the food on the spoon, Which then goes into our mouth.
How Cambodian use chopsticks:
Cambodians generally eat with a spoon and fork, unless there’s a bowl of soup in front of them, in which case it’s a spoon and chopsticks. For soup, use chopsticks to pick out the meat and noodles and the spoon for liquid elements.