Ancient Hebrew writings the Tannaim (rabbis cited in the Mishnah), the spoken vernacular of Jews in Judaea was a late form of Hebrew known as Rabbinic or Mishnaic Hebrew, whereas during the period of the Amoraim (rabbis cited in the Gemara), which began around 200 CE, the spoken vernacular was Aramaic. Hebrew continued to be used for the writing of religious texts, poetry, and so forth. There are significant differences between the two Talmud compilations. The language of the Jerusalem Talmud is a Western Aramaic dialect, which differs from the form of Aramaic in the Babylonian Talmud. The Jerusalem Talmud is often fragmentary
Leiden Jerusalem Talmud Talmud the Leiden Talmud was lost for around three hundred years. It was only to be rediscovered in the mid nineteenth century in the Library of the city of Leiden. It had been entrusted to the Library by the notable Protestant scholar Joseph Scaliger who was a professor at Leiden. The Leiden Talmud was transferred to the University of Leiden Library along with the rest of Scaliger's collection of manuscripts. Recently the Academy of Hebrew Language published an exact transcription of the Leiden Talmud along with carefully annotated corrections. In 1973 the manuscript was restored and rebound. Leiden Jerusalem Talmud