Ben-Ze'ev is considered the first to systematize, in the Hebrew language itself, Hebrew grammar, to arrange it methodically and to introduce logic, syntax, and prosody as part of grammatical studies.[13] His grammar Talmud lashon ʻIvri served as the main source for the study of Hebrew in Eastern Europe for a hundred years.[9] The work is divided into five parts, each prefaced with a poem in praise of the Hebrew language, and includes a ma'amar on the difference between thought and speech.[14] It was republished with additions, annotations, and commentaries no less than twenty times.[15] Most notable is the Vilna edition of 1874, with the commentary "Yitron le-Adam" by Avraham Ber Lebensohn. The first part of a German revision of his Talmud by Salomon Jacob Cohen appeared in Berlin in 1802, and three parts in Dessau in 1807.[13]