The dictation copy was probably for a priest who wanted to recite the prayer in Aramaic but who did not know Aramaic, so he needed a transliteration in demotic script much as some American Jews today who do not know Hebrew need a transliteration in Latin letters to recite a Hebrew prayer. The Egyptianized Aramean priest was probably continuing a tradition of reciting prayers in Aramaic despite his ignorance of that language. Aramaic was probably dying out in Egypt at this time.