The Undiscoverable/Fonts

Fonts: By default, only a few writing systems are covered. You need to use yum search -- -fonts in Terminal to find available font packages, and yum install name-font to install a font package.

You can try to install the fonts from other sources in your system during activity startup. The font files should be copied to $HOME/.fonts. To be sure that the fonts get "registered", run the command fc-cache, and then you can start up your activity.