The language of Yog is Sanskrit.

A Yoga class or self Practice often starts with chanting of Om .

Om is sound, and sound vibrates through space.

The inner and outer space.

Om takes its origins from the fusion of A U M ,

each sound evokes one dimension accessible to the Human Being.  

A  : Reality as perceived through senses

U  :  Dream State 

M : Deep Sleep 

Silence : the state that encompasses them all 

from the Mandukya Upaniṣad