"Grok" isn't really a good example - it was invented by a recent English speaker and used quite enough that it was clear enough what it meant (I'm not sure if H

"Grok" isn't really a good example - it was invented by a recent English speaker and used quite enough that it was clear enough what it meant (I'm not sure if Heinlein explained it outright but I don't believe he objected to various definitions published. Further if you do consider it a word in another language it translates reasonably directly into "understand intuitively" in standard English, not much different to how the word "get" is often used.) Leaving a word untranslated (but transliterated into modern English orthography as best as possible), with footnotes explaining possible meanings is seemingly sensible enough but the Bible is meant to be the "word of God", and leaving it sprinkled with words that nobody's sure about the meaning of would tend to undermine its attempt to sound authoritative on matters spiritual.