If I woke up one morning and everyone spoke the same language, it would be so easy to communicate with a person from a different country. We wouldn’t need to use translation because everyone would be speaking the same language. Furthermore, education could become more equal, as everyone would have access to the same resources.
But there is a negative side to everyone speaking the same language. For example:
Language is not just a means of speaking; it involves history, tradition, and identity. If there is only one language, many cultures will fade away.
Loss of identity: People bond with their native language. A single language weakens the way people express themselves.
Psychological impact: People may experience alienation when they lose the language in which they feel they “belong.”
In summary, one language makes the world easier but sacrifices diversity, identity, and originality. So, there are negative and positive things.