Special Characters Confluence PDF Export

I am working with Atlassian confluence pdf export, and trying to export special characters. After trying to follow this document
which suggests below steps

  1. Add a font family which supports special character.
  2. By going to general config > pdf language support
  3. Install it
  4. Update pdf style sheet with something like below
body {  
    font-family: ConfluenceInstalledFont;  

  1. Then export your page, it should come with special characters.

I was able to export the pages in confluenceInstalledFont with embedded font file. Was able to export some of the special symbols based on the font I uploaded. How do i make it work with backend?

Does confluence support special characters to be exported in PDF format via plugin backend?

@bentley could you please assist with above.