Simplify the following text for a Grade 7 native English-speaking person.
Original: His recitation , in his native Roscommon Irish dialect , remains one of the few recordings of a dialect that has long disappeared and of which Hyde himself was one of the last speakers .
Simplified: Hyde said the Presidential oath of office in Irish . The recording of his Roscommon dialect is one of the few recordings of the dialect , which has now died out .