We Should not Have a Global Language
It could be said that the incompletion of the tower of Babel results from different languages, which facilitates cultural diversity. But it is hard to fully understand each other if you speak a different tongue, so that is why some people advocate that we should establish a global language.
In my opinion, it is not a good idea to establish a global language. First, language itself is part of a culture. The meaning of words in one language is endowed by their cultural context rather than dictionary definition. Second, it is hard to choose an existing language as our global language. The equality between cultures rules out the rationale that one language should be chosen over all the others. And last but not least, to create a brand-new and so-called "neutral language" is not desirable either. History has already proven the failure of the wide use of Esperanto.
Indeed, a global language can save us a lot of time, money and energy currently devoted to translation and interpreting. But as I see it, such a cost is worthwhile to protect cultural diversity in the world. Just as Bertrand Russell said: "Diversity is essential to happiness". (195 words)