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".
Languages of Israel
Arabic was always considered a legitimate language for use in the Knesset alongside Hebrew, but only rarely have Arabic-speaking Knesset members made use of this privilege as while all Arabic-speaking MKs are fluent in Hebrew, fewer Hebrew-speaking MKs can understand Arabic.