i am responding to question number 1

The world in some ways would be a more peaceful place if everyone spoke the same language. However many of the same struggles would still continue. Speaking the same language would enable you to speak but it doesn't necessarily mean that communications would be better. A group of delegates can be in a room filled with many different languages and cultures and still accomplish as little in the way of communication and diplomacy as a group of delegates from the same language and culture. the only thing that would change if the world spoke the same language is that we would all hear the same words, how each nation interprets those words would still cause either peace or war. The amount of effort that it would take in order to accomplish the goal would still be the same the amount of friction every delegate would give would still be the same. Every country would still try to obtain the same goals the same way.