Charles Ellicott Commentary Deuteronomy 27:8

"And thou shalt write upon the stones all the words of this law very plainly." — Deuteronomy 27:8 (ASV)

Thou shalt write upon the stones all the words of this law — that is, the ten commandments. All else in the Law of Moses is but an application of the Decalogue to a particular people under particular circumstances. (See Notes on Joshua 3, Joshua 8:32, for more on the relation of the ten commandments to the conquest of Canaan.)

Very plainly. — See the note on Deuteronomy 1:5. Rashi says, “In seventy (that is, in all) languages.”

There is also an idea in the Talmud that when spoken from Sinai, the Law was spoken (or heard) in all languages at the same time.

This is a strange refraction of the truth indicated at Pentecost, when the Holy Spirit was given. Men spoke in every tongue the wonderful works of God.

The foundation of Jerusalem has effects exactly opposite to the foundation of Babylon (Genesis 11).