if the whole world would speak the same language it will be different that people that go to other places wont think that they are talking smaclk just cause they dont understand and if they had the language the same people wont be figthing because they touhtg some was talking bad about them.there will be peace between everyone because everyone is going to understand the language. it will be also different because if you would go to another country you wouldt now what language they speak but if everyone spoke the same language int will simple because when you go you will not be worried to see if they understand u or not.