Torah teaches that Hebrew is the original language. The world was created with the Holy Tongue. When G-d said “Let there be light,” He said it in Hebrew: “Yehi Ohr”. Adam was given his name because he was made from the ground (Adama), and Eve (Chava) because she was the mother of all life (Chai). These word plays only work in Hebrew.
All other languages are translations of the original, their vocabularies a series of made-up words. A cow is called a cow in English because we all agree to call it a cow. But it is called a Parah in Hebrew because it really is a Parah. The Hebrew word for things is their actual name.
There could be scholarly backing for the concept that it all started with Hebrew. Linguists have been able to trace words in multiple languages back to their Hebrew roots. For example, the Hebrew word Derech (way/road), can be found in Daroga (Russian), Derecho (Spanish), Durch (German), and Doro (Japanese), as well as our own English word, Direction. Some offer this as evidence that all roads lead to Hebrew.
But whatever the scholars may say, the Torah is our ultimate source. And the Torah teaches that Hebrew is G-d’s language. This is why we still pray in Hebrew. We are using the very words that G-d used to create the world. The very words have power. Even if we don’t understand what we are saying, our soul does. Hebrew is the natural language, the underlying vibration of the universe, the code that G-d spoke into creation.
Mendel (Menachem) Bluming from many sources including Midrash Bereishis Rabba 18:4 (See Rashi to Bereishis 2:23)