Simplify the following text for a Grade 11 native English-speaking person.
Original: As they spread to the east , the Manichaean writings passed through Middle Persian , Parthian , Sogdian , Tocharian and ultimately Uyghur and Chinese translations .
Simplified: As they spread to the east , the Manichaean writings passed through Middle Persian , Parthian , Sogdian , and ultimately Uyghur and Chinese translations .