This is really fantastic. It sent me looking for source materials for the character choices made for each language.

I'm dealing with a media experience in Dakota and Ojibwa right now where we have source material that is spelled/character-ed quite differently than the alphabet provided by Noto in those languages. Given the scale of this project, I assume that some considerable thought went into each language's character set, but it's difficult to know for sure without any sourcing. The git commit logs don't offer up any hints. Anyone familiar with the project, know where I could find this sort of source information?

Should I be referencing something in the Unicode definitions for these languages?