Dari

Dari is the name of Persian (Farsi) that is spoken in 
Afghanistan. It is an Indo-Iranian language.

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Information

More information

Overview of the alphabet and numbers

Short Course (download pdf)

Professional (paid) translations from/to Dari 

Resources for offline learning:

Farsi electronic dictionaries, translators & software
Course: Beginner's Dari

Dari dictionary and phrasebook
Lonely planet Central Asia phrasebook
More from Amazon.com...
Farsi products from worldlanguage.com

Other:
Swearing in Dari