[Spoiler] I think... Language

[Siverale]

Is there a completed Alphabet of the different glyphs in the game? Like the runes on the signs or the book from the ending?

What I've been able to gather has a few holes and I don't feel right just making it up or filling it in with whatever.

[Allanius2]

I have found a truetype font online that covers these letters. The following link will tell you about this writing and the TTF is in part 2. Have fun with it.
http://www.croatianhistory.net/etf/gl-font.html

Rats, I've just learned that the character used in game for "w" seems to be made up by the developers since it doesn't exist in the font.