Komentaryo sa Genesis 31:48: Ramban, Sforno, Radak & Tur HaArokh

AND LABAN SAID, THIS STONE-HEAP IS A WITNESS. After Jacob had called it Galed,²⁵²Verse 47 here. Laban spoke in Jacob’s language, This stone-heap is a witness, and therefore its name was called Galed, for they mutually agreed upon this name. It may be that Laban’s words are translated into the Sacred Language, [but he himself did not use the term Galed].

ויאמר לבן הגל הזה עד, he humbled himself to refer to it in Hebrew, Yaakov’s language, after having named it in Aramaic first. He meant that the pile of stones would serve as a witness to what he was about to say.

ויאמר, he made the statement following in his own language. Alternatively, he said all this in Hebrew as it is quite possible that Lavan knew Hebrew and when speaking with Yaakov used to speak to him in Hebrew.