Simplify the following text for a Grade 5 native English-speaking person.
Original: Tallassee ( first called Talisi by the Creek Indians ) is a city on the Tallapoosa River , located in both Elmore and Tallapoosa counties in the U.S. state of Alabama .
Simplified: Tallassee is a city split between Elmore and Tallapoosa counties in the U.S. state of Alabama .