Culture refers to customs, beliefs, and values of the people of a country or group. Other items that can be included are language, religion, attitudes toward work, authority and family, practices regarding etiquette, gestures, manners and traditions. In large countries like India or Russia, you can see different cultures within their borders.
Communication is a primary area where differences can be seen among countries. Some, like the US, can be very direct while in Japan nonverbal communication and indirect suggestions are often used to give instruction. World usage and terminology can vary across the world, even though English is used as a common language. For instance, in the US a "boot" is a type of shoe while in the United Kingdom a "boot" refers to the trunk of a car.