Today is the 17th Annual Septuagint Day, as the IOSCS has pronounced it. Our celebration this year is brief, but significant.
James Barr has some important words for us in terms of how the language of the Septuagint relates to later Greek, such as what we have in the New Testament.
If LXX meaning influenced later language, it was not because they were there in the book in paper but because they were in someone’s mind, or (to avoid mentalistic terms) were part of some continuing social process.James Barr, 1968. “Common Sense and Biblical Language.” Biblica 49: 377-78