JackieW wrote,"Another thing to be aware of is that Georgia is one of the fonts used for fallback if the user's chosen font doesn't contain a particular special glyph."
An aspect of this puzzles me. I read my books as Kepubs, and I have sideloaded the font Noto Sans, which, with my astigmatism, is the easiest font I've fond to read in.
Noto Sans contains a huge variety of glyphs -- indeed, the name "Noto" is short for "No Tofu," with "tofu" being the term for the little empty box or question mark you sometimes see on websites.
And YET, even when using Noto Sans, my Kobo Clara HD still substitutes from, it looks like, Georgia (and certainly from a serif font) for many non-Western-Eurpoean accented characters (like those found in Turkish names, for instance).
I assume this means that somewhere in its software, Kobo consults a table of characters that it assumes will be missing and then substitutes EVEN IF THE CHARACTER IS IN THE CHOSEN FONT.
Hmmm.
https://www.google.com/get/noto/