Answer:
The most important change brought by the development of language people can communicate better with each other than before, like when Stone Age people bring down large animals to telling stories to pass along from back then. If there was a language barrier, it would cause us to not be connected with our past and have nothing to learn or evolve from.
What is a language barrier?
Language barrier is a difficulty for people communicating because they speak different languages.
The inability to speak in the native language prevents individuals from being able to fully express their personality and form bonds with others. The individual may feel isolated from the rest of the population. Language barriers can foment discrimination and separation of groups.