I see many times, that author gives chapters various names formatting like:

• "***"
• "Twenty Four"
• "Chapter 5"
• "XIX"
• "Last Resort"
• "Ad notam" (or something latin or any foreign, (!not author!) language)

1.For which reason i need to use any of these methods of naming? Does there any hidden technique?

For example, if i want write a 'thinking' book, i will name chapters with Roman digits. (not sure, but as example)
If i want to write a 'funny' book, i will name chapters with 'funny' names.

2.Can i name my chapters in different from story language?
Use Latin language for chapter and use English language for story, for example.

Thank you for explanation!