Lowercase, lower case, lower-case?

[kayserifserif]

For consistency, which alternative spelling would be best to use in the book?

[kayserifserif]

People have used different spellings across different pages in the book. I'm wondering if there's one spelling we can decide on to use across the board for consistency.

[JoesCat]

After looking through English/French, sections 1...5, I sometimes see capital on one side, lowercase on the other, so we lack consistency across languages.

Google translate, also shows this problem when deciphering Chinese, Farsi, Japanese.

I guess start with the English for consistency, and if you recognize it in another language, you could fix that too. Since it's supposed to be a book, best to work with "lower case", since that's how you'd write it in school. "Lowercase" and "lower-case" is probably better left for programming preferences, or technical jargon which may prefer one or the other.

I hope this resolves your question (as tardy as this reply was) ;-P