Turkish ( , ), also referred to as Turkish of Turkey (Türkiye Türkçesi), is the most widely spoken of the Turkic languages, with around 80 to 90 million speakers. It is the national language of Turkey and Northern Cyprus. Significant smaller groups of Turkish speakers also exist in Germany, Austria, Bulgaria, North Macedonia, Greece, Cyprus, other parts of Europe, the Caucasus, and some parts of Central Asia, Iraq, and Syria. Cyprus has requested the European Union to add Turkish as an official language, even though Turkey is not a member state. Turkish is the 13th most spoken language in the world. To the west, the influence of Ottoman Turkish—the variety of the Turkish language that was used as the administrative and literary language of the Ottoman Empire—spread as the Ottoman Empire expanded. In 1928, as one of Atatürk's Reforms in the early years of the Republic of Turkey, the Ottoman Turkish alphabet was replaced with a Latin alphabet. The distinctive characteristics of the Turkish language are vowel harmony and extensive agglutination. The basic word order of Turkish is subject–object–verb. Turkish has no noun classes or grammatical gender. The language makes usage of honorifics and has a strong T–V distinction which distinguishes varying levels of politeness, social distance, age, courtesy or familiarity toward the addressee. The plural second-person pronoun and verb forms are used referring to a single person out of respect. Classification Turkish is a member of the Oghuz group of the Turkic family. Other members include Azerbaijani, spoken in Azerbaijan and north-west Iran, Gagauz of Gagauzia, Qashqai of south Iran and the Turkmen of Turkmenistan. Classification of the Turkic languages is complicated. The migrations of the Turkic peoples and their consequent intermingling with one another and with peoples who spoke non-Turkic languages, have created a linguistic situation of vast complexity. There is ongoing debate about whether the Turkic family is itself a branch of a larger Altaic family, including Japanese, Korean, Mongolian and Tungusic. The nineteenth-century Ural-Altaic theory, which grouped Turkish with Finnish, Hungarian and Altaic languages, is controversial. The theory was based mostly on the fact these languages share three features: agglutination, vowel harmony and lack of grammatical gender. History The earliest known Old Turkic inscriptions are the three monumental Orkhon inscriptions found in modern Mongolia. Erected in honour of the prince Kul Tigin and his brother Emperor Bilge Khagan, these date back to the Second Turkic Khaganate