It looks like Unicode range for Gujarati is not supported. When I import projects from Github which has Gujarati text as main project description, the text appears as '?' characters. Are other unicode character ranges supported?
It looks like it's a GitHub API specific issue that comes up after a day or two after importation. I've tested this out with Traditional Chinese throughout my profile and it seems to be specific to this one section (both in the profile and in the PDF). I'll bring this up with the other devs to see how we can get it fixed.
This bug has been fixed.
Non-latin descriptions are now fully supported for Github projects in profiles. The PDF preview also benefits from this fix.
Thank you for your report !