Zaza or Zazaki (Zazakî, Kirmanckî, Kirdkî, Dimilkî) is a Northwestern Iranian language spoken primarily in eastern Turkey by the Zazas, who are commonly considered as Kurds, and in many cases identify as such. The language is a part of the Zaza–Gorani language group of the northwestern group of the Iranian branch. The glossonym Zaza originated as a pejorative and many Zazas call their language Dimlî. According to Ethnologue, Zaza is spoken by around three to four million people. Nevins, however, puts the number of Zaza speakers between two and three million. In terms of grammar, genetics, linguistics and vocabulary Zazaki is closely related to Talysh, Old Azeri, Tati, Sangsari, Semnani, Mazandarani and Gilaki languages spoken on the shores of the Caspian Sea and central Iran. Ludwig Paul demonstrated that Zazaki is closely related to Old Azeri, Talysh and Parthian (an extinct northwestern Iranian language), shares many similarities with these languages and does not have universal Kurdish vowel changes. According to the head of the Paris Kurdish Institute, linguist Prof. Dr. Joyce Blau, Zazaki is a separate language and the history of Zazaki is older than that of Kurdish. Zaza is linguistically more closely related to Gorani, Gilaki, Talysh, Tati, Mazandarani and the Semnani language. Due to centuries of interaction, Kurmanji has had a impact on the language, which have blurred the boundaries between the two languages. This and the fact that Zaza speakers are identified as ethnic Kurds by some scholars, has encouraged some linguists to classify the language as a Kurdish dialect. Writing in Zaza is a recent phenomenon. The first literary work in Zaza is Mewlîdu'n-Nebîyyî'l-Qureyşîyyî by Ehmedê Xasi in 1899, followed by the work Mawlûd by Osman Efendîyo Babij in 1903. As the Kurdish language was banned in Turkey during a large part of the Republican period, no text was published in Zaza until 1963. That year saw the publication of two short texts by the Kurdish newspaper Roja Newe, but the newspaper was banned and no further publication in Zaza took place until 1976, when periodicals published a few Zaza texts.