Moses Maimonides contributed significantly to Jewish law in which language?

Moses Maimonides, also known as Rambam, significantly contributed to Jewish law through his works written in Judeo-Arabic, a literary form of vernacular Arabic. His most famous work, "Mishneh Torah," was composed in this language, allowing it to reach a broader audience, including those who spoke Arabic as their first language. By using vernacular Arabic, Maimonides made complex legal and philosophical concepts accessible to Jewish communities across the Islamic world, where Arabic was the lingua franca.

Using Hebrew or Aramaic would have limited his audience primarily to those already versed in those languages, while Latin was less directly relevant to Jewish law at that time, as it was primarily the language of the Christian scholarly tradition in medieval Europe. Thus, Maimonides' choice to write in vernacular Arabic is a key factor in understanding his significant impact on Jewish law and thought.