After some conversations on the Koha mailing list, I re-factored some of the language specific ICU chains pages and created
Which documents language specific modifications to words-icu.xml (and, at least theoretically, phrases-icu.xml).
If any devs know of modifications that they've made for other languages, I would *love* to see these added to that page -- five minutes of copy/paste on your part could easily save another member of the community days or weeks of effort.
Thank you!
--Barton