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

No one uses “Latin” numbers, unless you count Roman numerals.

The numbers that we use in the west are often called Arabic numerals. They were actually developed in India so some call them Indian numerals.

People in the Far East adopted them for the same reason that people in the west adopted them: it’s a better number system than what they were using before.