I find it interesting that those who insist that the Holy Spirit inspired the NT in Greek also insist that the Holy Spirit did not inspire some of the OT books written in Greek.
Your supposition is not factual.
The OT Bible was not revealed to gentiles except Job, and it was written by the authors to whom God progressively revealed His Will/Testament/Covenant. No Greeks were involved in the thousand-year-long process.
The Greek version of the OT books is a translation, however well or poorly it was done, and therefore cannot be God-breathed, or "inspired" by the Holy Ghost. So please don't continue to presume that the Greek translations of the Old Testament Scriptures are inerrant.
Actually, the Septuagint (LXX in Roman numerals) is full of errors, and is to be taken with a grain of salt, so to speak. It is as bad a translation as some of the newer English translations of the Bible are.
However, it can be used as a dictionary-in-place to estimate of Greek word equivalents of Hebrew words and phrases, and the meanings assumed to be in the mind of the Hebrew reader.
Which books were those bro? I thought ALL the OT books were written in Hebrew. I don’t think there was even one, that was originally written in Greek. If I am not mistaken, the Septuagint, was a Hebrew to Greek translation.