Simplify the following text for a Grade 13 native English-speaking person.
Original: Tajik ( TÄ jÄ `` k ; ) is a general designation for a wide range of Persian-speaking people of Ariana origin , with traditional homelands in present-day Afghanistan , Tajikistan , and southern Uzbekistan .
Simplified: Tajiks ( TÄ jÄ `` k ) are an originally Persian-speaking peoples of Iranian origin , spread in present-day in Afghanistan , Tajikistan , southern Uzbekistan .