 He began writing in Hebrew as a Haskalah writer and wrote according to all the conventions of Haskalah-era literature.At a certain point, he decided to write in Yiddish and caused a linguistic revolution, which was expressed in the widespread usage of Yiddish in Hebrew literature.After a long break he returned in 1886 to writing in Hebrew, but decided to ignore the rules of biblical Hebrew, and proponents of that style, like Abraham Mapu, and added into the vocabulary a host of words from the Rabbinic Age and the Middle Ages.