FASA Games, Inc.

Is there any source, official or fan made, that explains a Theran or Throalic alphabet/runes?
Runes appear in some old artwork in legacy 1st edition, on top of my head I remember seeing some runes on the Butterspider box's sides. It appears to spell FASA, but that could be my imagination of course
On topic, anyone has any sources, notes or ideas to share?
Thanks!

Nothing official, no.

Nothing fan-made comes to mind either (though my top-of-the-head knowledge of fan stuff is a lot fuzzier).