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

1. The “Latin numbers” (Arabic numerals actually, totally different things), are used by default in most of the world as the standard number system even for countries that have their own written number systems. Chinese and Korean included.
2. China does use the “Latin characters” (English alphabet actually) in their pinyin phonetic system. Chinese characters can also be seen on Chinese number plates but are only used to show the region the plate is issued at.
3. Korean license plate uses Hangul and not “Latin characters” (English alphabet actually).