You are aware that the Tanach/ Tanack is written in Hebrew /Aramaic?
If they were they were written after Moses was lomg gone.
“The Early Aramaic or Proto-Hebrew alphabet was developed sometime during the late 10th or early 9th century BC and replaced Assyrian cuneiform as the main writing system of the Assyrian empire. This alphabet is thought to be the ancestor of a number of Semitic alphabets as well as the Kharosthi alphabet. At the end of the 6th century BC the Early Aramaic alphabet was replaced by the Hebrew square script which is also known as the Aramaic alphabet.?
http://www.omniglot.com/writing/aramaic.htm