 Many national flags and other flags include religious symbols such as the cross, the crescent, or a reference to a patron saint.Flags are also adopted by religious groups and flags such as the Jain flag, Nishan Sahib (Sikhism), the Saffron Flag (Hindu)and the Christian flag are used to represent a whole religion.As languages rarely have a flag designed to represent them, it is a common but unofficial practice to use national flags to identify them.