And I can't help but think that there is an incredibly simple solution.
Every child in the world, regardless of their mother tongue, should be required to learn basic sign language. If this were done, within two generations anyone, from anywhere, could communicate effectively with anyone. We could come to understand one another more easily. Tensions would ease. People need not feel intimidated when away from their homeland.
And signing is much easier to learn than most languages - even I was able to pick it up.
Think about it.