English-Interlingua 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 as well as English is required already exists.
English is a common language Use Interconnection Whether Each of language as the national language. To interact with people of different languages. English is the primary need anyway.
English as a lingua franca. The communication between each other. No matter what language is the national language, each use. When dealing with people of different languages. To use English as the main course.