During the 6th century BCE, the Babylonian captivity brought the working language of Mesopotamia much more into the daily life of ordinary Jews.
The destruction of Persian power, and its replacement with Greek rule helped the final decline of Hebrew to the margins of Jewish society.
The language shows a number of Hebrew features have been taken into Jewish Aramaic: the letter He is often used instead of Aleph to mark a word-final long a vowel and the prefix of the causative verbal stem, and the masculine plural -īm often replaces -īn.
Different strata of Aramaic began to appear during the Hasmonaean period, and legal, religious, and personal documents show different shades of hebraism and colloquialism.
The First Jewish–Roman War of 70 CE and Bar Kokhba revolt of 135, with their severe Roman reprisals, led to the breakup of much of Jewish society and religious life.
Thus, the standard vowel marks that accompany pointed versions of the Tanakh may be more representative of the pronunciation of Middle Galilean Aramaic than of the Hebrew of earlier periods.
At the beginning of the 20th century, dozens of small Aramaic-speaking Jewish communities were scattered over a wide area extending between Lake Urmia and the Plain of Mosul, and as far east as Sanandaj.
Today, most first-language speakers of Jewish Aramaic live in Israel, but their distinct languages are gradually being replaced by Modern Hebrew.
The full scope of Judeo-Aramaic studies includes not only linguistic, but rather the entire cultural heritage of Aramaic-speaking Jewish communities, both historical and modern.