There are many advatages that eyeryone in the world spoke the same language.. among them, the most advantage thing is convenient to travel. It can be possible to order menu in other countries and to decrese inconvenient misunderstanding situation caused to do not through lanuage. Although It will be not more peaceful as everyone spoke same language. Because here are many conflicts in Korea which is spoken only same language. I think that the conflict must existed because of different value that people have, such as culture, religion, idea. But, Speaking the same lanuage is just helpful to talk each other for resolve issues.

Thank you for this So Myeong!