Simplify the following text for a Grade 7 native English-speaking person.
Original: Urdu in its less formalised register has been referred to as a rekhta ( Ø Û Ø Ø Û , ( reË xtÌ aË ) ) , meaning `` rough mixture '' .
Simplified: Urdu in its less formalised register has been called a rekhta ( Ø Û Ø Ø Û , ( reË xtÌ aË ) ) , meaning `` rough mixture '' .