I see many times, that authors use various name formats for chapters:

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

1. For which reason do I need to use any of these methods of naming? Is there any hidden technique?

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

2. Can I name my chapters in a different language than I write in?
   Use Latin for chapters and English for the story, for example.