Thanks for your reply.
I’m testing with Keyman. I wasn’t trying to use it system wide because I remember learning that wasn’t possible.
Like I mentioned above, I was able to get the custom font to install at one point until I changed the Unicode characters. I was wondering if it has something to do with how I’m exporting the font as there’s the possibility I may have not been consistent. I think I was exporting them as: .ttf; Open Type Layout; glyph names regenerated; no hinting. I don’t know if this is the best way though.
Some of my fonts and keyboards use Latin Unicode while others use Arabic (for right-to-left experimental fonts/writing systems, etc…). Do I export them the same way?
Do you have an alternative platform to Android you’d recommend that’s more efficient? I haven’t learned all the “details” of the differences yet.