Dari is the the variety of Persian spoken in Afghanistan, where it is one of the two official languages, along with Pashto, and is used as a lingua franca among the different language communities. Dari is also used as the medium of instruction in Afghan schools. About 5 million people speak Dari in Afghanistan. There are also about 2.5 million Dari speakers in the Iran and Pakistan.
Dari is known as دری (Darī), فارسی دری (Fārsī-ye Darī) or Afghan Persian. It is mutually intelligible with Persian (Farsi) of Iran, though there are some differences in pronunciation and grammar.
Dari is written with a version of the Perso-Arabic script.
Tamām-e afrād-e bašar āzād zāde mīšūnad va az leḥāż-e ḥais̱īyat-o karāmat-o ḥoqūq bā ham barābarānd. hamgī dārā-ye ʿaql-o vejdān hastand va bāyad bā yekdīgar bā rūḥīye ai barādarāne raftār konand.
All human beings are born free and equal in dignity and rights. They are
endowed with reason and conscience and should act towards one another in a
spirit of brotherhood.
(Article 1 of the Universal Declaration of Human Rights)
Information about the Dari language and alphabets
Dari Language Project - a linguistic research organization dedicated to the documentation of Dari: http://www.darilanguageproject.org
Language learning books and software for Pashto, Dari / Farsi / Persian