Guttural R
Many Jewish immigrants to Israel spoke a variety of Arabic in their countries of origin and pronounced the Hebrew rhotic as an alveolar tap , similar to Arabic '. Gradually, many of them began pronouncing their Hebrew rhotic as a voiced uvular fricative , a sound similar or (depending on the Arabic dialect) identical to Arabic '. However, in modern Sephardic and Mizrahi poetry and folk music an alveolar rhotic continues to be used.
Albert Schultens
Schultens was the chief teacher of the Arabic language in the whole of the Europe during his lifetime. In some sense, he revived Arabic studies. He differed from J. J. Reiske and Silvestre de Sacy in regarding Arabic as a handmaid to Hebrew. Reiske considered Schultens' treatment of Arabic to be of little value, also maintaining that Arabic studies should not be taught as part of theology, but as a subject matter in its own right, as was mathematics, physics, geography and medicine. Schultens vindicated the value of comparative study of the Semitic tongues against those who, like Jacques Gousset, regarded Hebrew as a sacred tongue with which comparative philology has nothing to do.