Revival of the Hebrew language well-recognized sources, chiefly the Tanakh (especially those portions used liturgically like the Torah, Haftarot, Megilot, and the Book of Psalms) and the Mishnah. Apart from these, Hebrew was known through hymns, prayers, midrashim, and the like. During the Middle Ages, Hebrew continued in use as a written language in Rabbinical literature, including in judgments of Halakha, Responsa, and books of meditation. In most cases, certainly in the base of Hebrew's revival, 18th- and 19th-century Europe, the use of Hebrew was not at all natural, but heavy in flowery language and quotations, non-grammatical forms, and mixing-in of other languages, especially Aramaic.
Revival of the Hebrew language speaking other languages on the street were admonished: "Jew, speak Hebrew" (Yehudi, daber ivrit/יהודי, דבר עברית), or, more alliteratively, "Hebrew [man], speak Hebrew" (Ivri, daber ivrit/עברי, דבר עברית) was a campaign initiated by Ben-Yehuda's son, Itamar Ben-Avi. The Academy of Hebrew Language focused on the structure and the spelling of Hebrew, and prompted the issues about the further expansion of the use of Hebrew in Mandatory Palestine. The Academy worked with the Language College to publish the Ben-Sira in a scientific form. By the time Israel gained independence in 1948, 80.9% of Jews who had been born in Palestine spoke