Semitic languages
The similarity of the Hebrew, Arabic and Aramaic languages was accepted by Jewish and Islamic scholars since medieval times. The languages were familiar to Western European scholars due to historical contact with neighbouring Near Eastern countries and through Biblical studies, and a comparative analysis of Hebrew, Arabic, and Aramaic was published in Latin in 1538 by Guillaume Postel. Almost two centuries later, Hiob Ludolf described the similarities between these three languages and the Ethiopian Semitic languages. However, neither scholar named this grouping as "Semitic".
Yemenite Hebrew
Although the vast majority of post-Biblical Hebrew and Aramaic words are pronounced the same way or nearly the same way by all of Israel's diverse ethnic groups, including the Jews of Yemen, there are still other words whose phonemic system differs greatly from the way it is used in Modern Hebrew, the sense here being the tradition of vocalization or diction of selective Hebrew words found in the Mishnah and Midrashic literature, or of Aramaic words found in the Talmud, and which tradition has been meticulously preserved by the Jews of Yemen. The following diagrams show a few of the more conspicuous differences in the Yemenite tradition of vocalization and which Israeli linguist, Shelomo Morag, believes reflects an ancient form of vocalizing the texts and was once known and used by all Hebrew-speakers.