Here's why:
* Language is diverse and constantly evolving: Languages have always been diverse, reflecting the unique histories, cultures, and environments of different groups of people. New languages develop and old ones evolve.
* No single language is universally understood: While some languages like English are widely spoken, they are not understood by everyone in the world.
* Attempts at artificial languages: People have tried to create universal languages, like Esperanto, but these have not become widely adopted.
Instead of a "universal language," we have:
* Lingua Francas: These are languages that are used for communication between people who speak different languages, like English in international business or Arabic in some parts of the Middle East.
* Translation and interpretation: These tools allow people to communicate across language barriers.
It's unlikely that a true universal language will ever exist. The richness and diversity of human languages are part of what makes our world fascinating.