The Arabic spoken by Jewish communities in the Arab world differed slightly from the Arabic of their non-Jewish neighbours. These differences were partly due to the incorporation of some words from Hebrew and other languages and partly geographical, in a way that may reflect a history of migration. For example, the Judeo-Arabic of Egypt, including in the Cairo community, resembled the dialect of Alexandria rather than that of Cairo. Similarly, Baghdad Jewish Arabic is reminiscent of the dialect of Mosul. Many Jews in Arab countries were bilingual in Judeo-Arabic and the local dialect of the Muslim majority. Like other Jewish languages and dialects, Judeo-Arabic languages contain borrowings from Hebrew and Aramaic. This feature is less marked in translations of the Bible, as the authors clearly took the view that the business of a translator is to translate.
Jews in Arabic, Muslim majority countries wrote—sometimes in their dialects, sometimes in a more classical style—in a mildly adapted Hebrew alphabet rather than using the Arabic script, often including consonant dots from the Arabic alphabet to accommodate phonemes that did not exist in the Hebrew alphabet. Some of the most important books of medieval Jewish thought were originally written in medieval Judeo-Arabic, as well as certain halakhic works and biblical commentaries. Later they were translated into medieval Hebrew so that they could be read by contemporaries elsewhere in the Jewish world, and by others who were literate in Hebrew. These include:
Saadia Gaon's Emunoth ve-Deoth, his tafsir and siddur
Solomon ibn Gabirol's Tikkun Middot ha-Nefesh
Bahya ibn Paquda's Kitab al-Hidāya ilā Fara'id al-Qulūb, translated by Judah ben Saul ibn Tibbon as Chovot HaLevavot
Judah Halevi's Kuzari
Maimonides' Commentary on the Mishnah, Sefer Hamitzvot, The Guide for the Perplexed, and many of his letters and shorter essays.
In the years following the 1948 Arab–Israeli War, the end of the Algerian War, and Moroccan and Tunisian independence, most Mizrahi and Sephardi Jews in Arab countries left, mainly for mainland France and for Israel. Their distinct Arabic dialects in turn did not thrive in either country, and most of their descendants now speak French or Modern Israeli Hebrew almost exclusively; thus resulting in the entire continuum of Judeo-Arabic dialects being considered endangered languages. This stands in stark contrast with the historical status of Judeo-Arabic: in the early Middle Ages, speakers of Judeo-Arabic far outnumbered the speakers of Yiddish. There remain small populations of speakers in Algeria, Morocco, Tunisia, Lebanon, Yemen, Israel and the United States.
