Western Armenian (Classical spelling: , arevmdahayerên) is one of the two standardized forms of Modern Armenian, the other being Eastern Armenian. Until the early 20th century, various Western Armenian dialects were spoken in the Ottoman Empire, especially in the eastern regions historically populated by Armenians known as Western Armenia. Following the extermination of the indigenous Armenian population during the Armenian Genocide of 1915 Western Armenian is now spoken, almost exclusively, in the Armenian diaspora communities around the world. As a diasporic language, and as a language that is not an official language of any state, Western Armenian faces extinction as its native speakers lose fluency in Western Armenian amid pressures to assimilate into their host countries. Estimates place the number of fluent speakers of Western Armenian at less than one million.