why do countries such as South Korea and China have latin numbers and letters on their license plates when their language doesn’t use them?

Question

Edit: Latin letters and numbers might not be the right word. I meant letters such as AaBbCc and numbers such as 123.

In: 3829

Answer 1

They do use them. It’s just that unlike some other languages it’s not uncommon to some times see numbers written out, usually small, whole numbers, since they have characters for them. It would be like writing “coffee, two dollars” on a menu instead of “2 dollars”.