Simplify the following text for a Grade 10 native English-speaking person.
Original: Badeshi is a northwestern Iranian language spoken by over 10,000 people in upper reaches of Bishigram Valley ( Chail ) , east of Madyan , Swat , Kohistan in Northern Areas of Pakistan .
Simplified: Badeshi is an Indo-Iranian language spoken in the upper reaches of the Bishigram Valley ( Chail ) , east of Madyan , Swat , Kohistan in Northern Areas of Pakistan .