Why Hasn't AI Mastered Language Translation?

In the myth about the Tower of Babel, people conspired to build a city and tower that would reach heaven. Their creator observed, "And now nothing will be restrained from them, which they have imagined to do." According to the myth, God thwarted this effort by creating diverse languages so that they could no longer collaborate. Language remains a barrier in business and marketing. Even though technological devices can quickly and easily connect, humans from different parts of the world often can't.