Q: Does the accordion panel have the possibility to display non latin characters in the panel headers (like Cyrillic or Chinese) ?

A: Yeas it has that possibility. Just define the font you need in the component's .xml file (<styles> node), write the titles you want for the panels and remember to save the .xml file with UTF-8 encoding. When you test the movie, the characters should be visible if you set the embedFonts property to false.

If you need to embed the fonts, set the component's embedFonts property to true and place a text field on the Stage (or outside of it) and embed into it all the characters you need by pressing on the Embed button. You can read more in the accompanying documentation file.
Files: AccPanel_NonLatinChars.zip