The communication between Whether an individual uses language as the national language. When dealing with people of different languages, different cultures, all people need to use English as the main.
Used to communicate with each other, no matter what language is used, each national language. To keep in touch with others who are different languages, different cultures, everyone needs to use English.
Use communicate with each other, each of them will be using what language is the national language when you need to communicate with other people who are foreign language culture, everyone will need to use the English language.