Simplify the following text for a Grade 13 native English-speaking person.
Original: The Greco-Roman world , Greco-Roman culture , or the term Greco-Roman ( or ; sometimes spelled Graeco-Roman in the United Kingdom and Commonwealth ) , when used as an adjective , as understood by modern scholars and writers , refers to those geographical regions and countries who culturally ( and so historically ) were directly , protractedly and intimately influenced by the language , culture , government and religion of the ancient Greeks and Romans .
Simplified: The Greco-Roman or Graeco-Roman world , refers to geographical regions and countries who were influenced by the language , culture , government and religion of the ancient Greeks and Romans .