My wife is Vietnamese, so I have a basic grasp of it, but they don’t really have a word for yes.
The verb itself is used to answer the question.
Want something to drink? Drink. Want to go to the park? Go.

They have a word for no, but as you can probably ascertain, it’s only for the negative.

Funnily enough, that is a keyword in rust.

(it’s a placeholder to remove any bikeshedding)