Because humans are social animals, so communication is required. Despite not having their own language, they must be adopted in other languages, it is used as the primary Visual English.
Since humans are social animals We need to communicate with each other. Even without their own language. I have used the language. The key thing is English.
Because man is a social animal. Therefore, it is necessary to have communication. Even without their own language and other languages, it must bring the use that the key point is English.