All the early Hebrew grammars, from that of Reuchlin down, assert the divine origin and miraculous claims of Hebrew.

It is constantly mentioned as "the sacred tongue"-- sancta lingua.

In 1506, Reuchlin, though himself persecuted by a large faction in the Church for advanced views, refers to Hebrew as "spoken by the mouth of God." This idea was popularized by the edition of the Margarita Philosophica, published at Strasburg in 1508.

That work, in its successive editions a mirror of human knowledge at the close of the Middle Ages and the opening of modern times, contains a curious introduction to the study of Hebrew, In this it is declared that Hebrew was the original speech "used between God and man and between men and angels." Its full-page frontispiece represents Moses receiving from God the tables of stone written in Hebrew; and, as a conclusive argument, it reminds us that Christ himself, by choosing a Hebrew maid for his mother, made that his mother tongue.
It must be noted here, however, that Luther, in one of those outbursts of strong sense which so often appear in his career, enforced the explanation that the words "God said" had nothing to do with the articulation of human language.

Still, he evidently yielded to the general view.