How many languages do you think exist in the world? About 6 thousand, according to the site jazyki.ru (http://www.jazyki.ru/skolkojazykov)1. And can you imagine all people speaking only one language? It is considered that speaking one language would lead to better understanding between countries, but it is questionable if it is possible to establish it and would really solve international problems.
One of the main problems during any travel abroad is overcoming art language barrier. So if everyone spoke one language, it would be easier to communicate with people in foreign countries. There you would be able to find your bearings easier because you could read all signboards or ask any person to show you the way. Moreover, in case of emergency you would be able ask (Gr) for help quicker. In such situations you depend on unknown people who you need to turn to, you need them to understand you2. For example, two of my friends, who went to the USA, had to call for a doctor when one of then had a terrible stomach ache. The girl who was not sick that day but could speak English helped a doctor to understand what was wrong with her friend. Add a conclusion3
On the other hand, nowadays it would be really difficult to create the language that would suit everyone. Now English is often called art leading language of international discourse. But using art language of a particular nation can be taken (WW) as a discrimination of other languages. So there were attempts to construct international languages. The most famous one among them is Esperanto. According to the article about Esperanto in Wikipedia, it was created in the end of the 19th century by L. L. Zamenhof. His goal was “to create an easy-to-learn and politically neutral language that would foster peace and international understanding.” But after creating Esperanto in the end of 19th century, establishing it in the