Both Pashtu (or Pushtu) and Dari (Afghan Persian) are the official languages of the country. Pashtu is spoken by about 35% of the population while approximately 50% speak Dari. Although Pashtu has a literature of its own, Dari, the language spoken in Kabul, has been the principal language of cultural expression, of the government, and of business. Both Pashtu and Dari are written primarily with the Arabic alphabet, however, there are some modifications. The Hazaras speak their own dialect of Dari. The Turkic languages, spoken by 11% of the population, include Uzbek and Turkmen, and the Nuristanis speak some seven different dialects belonging to the Dardic linguistic group. There are about 30 minor languages, primarily Balochi and Pashai, spoken by some 4% of the population. Balochi belongs to the same linguistic group, as do several languages spoken in the high Pamirs. Bilingualism is common.