Simplify the following text for a Grade 6 native English-speaking person.
Original: `` Nyingma '' literally means `` ancient , '' and is often referred to as the `` school of the ancient translations '' or the `` old school '' because it is founded on the first translations of Buddhist scriptures from Sanskrit into Tibetan , in the eighth century .
Simplified: The word `` Nyingma '' means `` ancient '' .