[boatbums]

This indeed is unlikely as the readings at worship were done in Hebrew and from the Hebrew Bible. But the author admits not being a scholar right away.

Thank you. That was exactly my point. I wonder how many other people reading articles such as this do not know it either?

[annalex]

The author was making a correct broader point: that the Septuagint was the source of inspirational reading for the 1 century Jews. He overshot it a little bit claiming that it was not only inspirational reading but liturgical reading.

Certainly low-church Protestants should not even notice the distinction because they have no liturgy.