Simplify the following text for a Grade 8 native English-speaking person.
Original: Families of current flags may derive from a few common ancestors as in the cases of the Pan-African colors , the Pan-Arab colors , the Pan-Slavic colors , the Nordic Cross flag and the Ottoman flag .
Simplified: This means that many flags in an area may look similar because they are all based on one historical flag . Examples include the Pan-African colors , Pan-Arab colors , and the Nordic Cross .