Hmmm. But Aramaic was the language of the Babylonian Exile, which is why it is the language of the Babylonian (as opposed to the Jerusalem) Talmud. The Mishna, however, which is at the head of each group of arguments in the Talmud is in Hebrew. Within the very limited vocabulary of this literature, there are a lot of similarities between words of the two languages. Aramaic is also said to be the one language angles cannot understand. That is why the kaddish must always said in a minion: it bipasses the intercession of the angels and goes straight to God's ear.