> I summarized some of it in the users manual here: https://intellij-asciidoc-plugin.ahus1.de/docs/users-guide/features/advanced/pdf-non-latin-languages.html

Keep in mind that you don't need to redeclare any of the bundled fonts. Instead, you can configure the font catalog to merge the additional entries.

extends: default
font:
  catalog:
    merge: true
    cjk: YourCJKFontHere.ttf
base:
  font_family: cjk

Best Regards,

-Dan