Is a United Language Good for Us?

Different languages exist for the purpose of language diversity, and here is why.

If there is only an universal language, all thoughts of humankind will be expressed by it. However, the complexity of human thoughts is so high that no single language is able to describe them totally.

Language is a representation of our mind by symbols, which can be acquired for a finite amount only, as the cognition power of our brain is limited. One language with a limited set of symbols may not be able to describe all of our thoughts.

To have a total description of human thoughts, different part of them will be described by different languages, which requires the existence of language diversity.

However, language diversity also creates language barriers, which prevents the transmission of human thoughts.

A universal language is possible when speakers use the same set of symbols but acquire them on demand, which means that speakers with similar thoughts, and thus similar set of acquired symbols can communicate, but speakers with different thoughts may not understand each other. It is already better than the case of having diverse languages, since speakers with similar thoughts but different languages may not understand each other, while it is not possible with a universal language.

However, the universal language will have regulations, like word order, which exist to save our cognitive load but limit human thoughts, so the above one can only describe our thoughts to a great extent but not totally,

In consideration of the benefits of language diversity, only one universal language is not beneficial for humankind. A better solution will be an universal language plus a local language, which preserves the diversity and transmission of human thoughts.