Recently a neighbor reported a strange dream in which she was told there will be no peace on earth until all peoples and nations speak the same language. At first glance this sounds like a new-age religion episode in which the earthbound practitioner appears to have personal telephone connections with a spiritual adviser.
It is difficult to identify the spirits that exist as both good and evil spirits. The evil spirit can masquerade as a good spirit.
In Genesis we read of the Tower of Babel, which was constructed by humans speaking the same language. Because they wanted to reach heaven, God destroyed their tower and confused the humans, causing them to speak different languages so that they could not compete with God.
Possibly there is a reason for multiple languages on earth. Police and soldiers would be needed to enforce the use of one language, surely not a peaceful arrangement. Which language would be chosen? Recently when Bulgaria forbade the use of the Turkish language by the Turkish minority, many Turks crossed the border into Turkey, not a peaceful situation.