Did you ever think?
When you think of all the languages in the world today, many of which have various dialects, you wonder how do you communicate with each other? Did you ever think that those with no hearing can communicate with people all over the world through sign language? Think if sign language became the universal language than people could communicate with others no matter what language you spoke unless you are blind: Although I believe that blind people can see with their hands so... I'm personally not familiar with sign language and so am not sure if sign language is the same across all borders but it's something to think about.