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".
Arabic language in Israel
Modern Standard Arabic (also known as Standard Arabic or Literary Arabic), is currently an auxiliary language in Israel and its use on government documents is mandated by law. Spoken Arabic dialects are spoken primarily by Arab citizens of Israel and Israeli Druze, as well as by some Mizrahi Jews, particularly those of the older generation who immigrated from Arabic-speaking countries. In 1949, 156,000 Palestinian Arabs were left inside Israel's armistice line, most of whom did not speak Hebrew. Today the majority of Arab Israelis, who constitute over a fifth of the Israeli population, speak Hebrew fluently, as a second language.