Brahmā in Sanskrit transliterates Brahma, Brahma and Brahma, meaning "purity" and "silence".
Pure Sanskrit practice. -Lotus Sutra.
Another example: Brahma (pure heart); Brahma's ambition (aiming at quietness); Brahma (pure practice); Brahma (pure Buddhism).
Buddhist scriptures were originally written in Sanskrit, so everything related to Buddhism is called Brahma.
Sanskrit is the written language of ancient India, so it is often used as Sanskrit to show that it is different from China.
The general meaning may be illusory and untrue.