Ruby characters in Chinese, Japanese, Korean, and Vietnamese

https://en.wikipedia.org/wiki/Ruby_character

I'd like to learn how to use Ruby characters within the H5P editor when creating interactive content. Any insights are greatly appreciated.

Content types commonly used: Column, Text, Drag the Words, Fill in the Blank, Multiple Choice, True/False

I've gotten a very basic sense of how to apply it in an HTML text editor, but not the interactive content.