There are thousands of languages being spoken in many regions around the globe. However, perhaps (từ này hơi informal) in a the foreseeable future, only one common language will exist as a means of communication in the human world. In my opinion, this development, despite being the facilitation of international communication, is a detriment to our diversity as a species.
On the one hand, if we (không dùng đại từ we trong writing) all people spoke the same language, it would be the bridge to harmony and understanding between different cultures and countries. It would eliminate the key hurdle problem that keeps a group of people away from others because we all have a sense of familiarity in language. We can therefore comprehend (word choice) embrace more profoundly different cultures that used to be somewhat misinterpreted due to a linguistic barrier.
Nevertheless, if there were one common language, a part of a country’s core identity would be sacrificed. Language not only is not only the way helps people living in the same society communicate effectively but also symbolizes their origins and defining characters. Vietnamese people, for example, have been known for their heroism and patriotism through words of their anthems. Or everyone thinks of France is commonly considered (mình suggest passive voice để nó formal hơn) as a land of romance because French is a language of love.
In addition, cultural diversity and historical values would also be put at stake as a consequence of this trend. Dialects in any part of a country carries carry unique stories and lessons of the past which are closely linked to religions, beliefs, and lifestyles. And Besides, a world that uses only one language would be the ground for the likely sad disappearance of those precious aspects of life.
In conclusion, I feel suppose that this global linguistic change is a major threat to human identity, culture and history although, to some point, it does help ease language barriers.