First, the world-common language will lead to cost savings. If every people be able to communicate with a only language, it will be much more easier to toss the information around without any kinds of transcription or interpretation. That means, it makes us save unneeded cost and possible energy.
Another reason is that there will be an enormous academic improvement. Every scholar report and information will be written in the world-common language in order to aloow for greater international collaboration and research. It means that scholars worldwide can plunge into a same subject, and of course, wider information will be collected and can change a depth of scholar research.
The next reason is that it will be easy to get several events worldwide and to travel without a barrier of language. That means, it can make the world more familiar with each other. To say, there will be a less psychological distance between each other. According to one survey taken by The Korea Culture and Tourism Institute, travelers said that the language barrier is the greatest inconvenience they experience while traveling. Also, an another survey taken by the Visit Korea Committee between September and October last year showed that 66 percent of travelers complained about the language barrier during a travel.
Finally, it will make improve the language itself. As more people speak the same language, more words will be made and at the same time, less spoken words will distinguish. It makes the language more convenient to express what the speaker intents to say. While some people argue that setting the world-common language may upper the possibility of disappearing unspoken languages, it can be solved with a constant study of their native language in schools.
To conclude, it is a good idea for the world and the language itself to establish the world-common language in the point of followed four reasons. I wish for the world of one language and at the same time, still speaking the native languages.

