What version -- English or otherwise -- translates the Hebrew word for 'fruit' into 'apple'?
It's translated generically as "fruit" in all English versions that I know of. Likewise, it's translated as a generic fruit in the Vulgate (Latin - 'fructus') and Septuagint (Greek - 'karpos').
As far as 'almah' is concerned, the word is generally used in the OT to represent a young unmarried woman. It is presumed that such a woman would be a virgin (shocking, I know.) The context of its use in Isaiah 7:14 is that of virginity, the Jews who translated the Hebrew passage into Greek (200 years before Christ) used the Greek term for virgin, and Matthew's Greek quote of the verse in the context of Mary's pregnancy also uses the Greek term for virgin. Quibbling over the word 'almah' is strange in light of the fact that Luke explicitly states Mary had never had sex (see Luke 1:34) and that, while espoused to Joseph, she had yet to do the deed. (Matt 1:18).
One of my favorite editions is "The Word: The Bible from 26 Translations", which has different translations of each verse printed together. It's a huge book, and I can only imagine how much work went into it. The credits are two pages long.
Volume 1: https://archive.org/details/oldcovenantcommo01thom/page/n5/m... Volume 2: https://archive.org/details/oldcovenantcommo02thom/page/n3/m...
I'll also point you to Brenton's translation of the Septuagint, which is also a good addition if you don't already have it. This particular version has the original Greek and the English translation in parallel:
https://archive.org/details/septuagintversio1879bren/page/4/...
https://www.vatican.va/archive/bible/nova_vulgata/documents/...
and it uses only the word "fructu", i.e. fruit, presumably translating "carpo" from Greek. There is no other more specific word.
i read the ot in german standard translation coined by luther and a modern (but conservative) translation of the nt by kammermayer.
my disappointing take away was how dull and boring the bible is. i didn't find much inspiration in it. and i am spiritually inclined with an open mind towards christian mysticism.
but of course the bible as we know it is a disfigured and violated excerpt of a larger partly secret canon. so to understand it better precisely stuff like apple/fruit or girl/virgin are relevant and also make it more interesting.
Any recommendations on Christian (or not) mysticism? That's not something I've ever delved into at all.
Read about hesychasm, read about orthodox monks living in deserts, read about Mount Athos.
The Philokalia is worth checking out.