In the later millennia, it was often used to show respect between members of the clergy and laymen. Sarcev Quest was fluent in High Galactic. It was also used as the language of the Imperial court and elite, as most officers from prestigious families were familiar with High Galactic.
Additionally, the language was also an ancient language used by the Jedi Order. An example of this usage would be many of the names of their lightsaber forms.
Its alphabet became an alternative to Aurebesh for written forms of Basic.