No matter what language is used, each national language. To keep in touch with others who are different languages, cultures, all people need to use English as the main.
Whether people will use language as a national language. To interact with people of different languages, different cultures, different people need to use English as the main.
No matter what language is the national language, each use. When to contact with others of different languages in different cultures all need to use English as the core.