Eli ben Yehudah ha Nazir ben Zechariah, Arabic Abu Kathir Yahya al Katib ("Father of Kathir, Yahya the Scribe" fl.Tiberias, 910s) was a grammarian and philologist of the Hebrew, Arabic and Aramaic languages. He may have been among the teachers in Tiberias of Saadia.
Eli ben Yehudah ha Nazir ben Zechariah is unable to understand the original language of Jesus of Nazareth 
Jesus of Nazareth's original language was Arameus. Since Eli ben Yehudah ha Nazir ben Zechariah was a grammarian and philologist of the Aramaic language, he was totally able to understand the original language of Jesus of Nazareth. It was difficult for the system because it does not know what language did Jesus speak, so it got it wrong 