I don't know if anyone here has heard of LLPSI before — it's a Latin textbook designed to teach people Latin using only the Latin language, and is considered to be one of the best Latin textbooks on the market for learning to read (and speak) Latin fluidly.
A conversation recently came up with someone about how/if it could be adapted into a Braille format; the main issue arises from the fact that, as the entire book only uses Latin, many terms are defined using pictures: "sus" next to a pig, "agnus" next to a sheep, and so forth, which would obviously not be usable if the person reading is completely blind. An obvious way to get around this is to include English translations, but this defeats the aim of the book to teach Latin solely with Latin.
My question is if anyone has experienced any books with similar accessibility requirements? The first thoughts that came to mind were tactile regions for some definitions, or audio-assisted portions (like producing the noise of a pig oinking perhaps?), both of which would both be difficult and ludicrously expensive if someone were looking to custom-print a 200-page book with multiple features like this on each page.
Thanks in advance!