In this world of mass cultural diffusion and globalization, people are required to speak each other's languages more than ever. And while learning English, Swahili, French can help you target certain regions of the world, the best languages are those that are the most influential and the most powerful everywhere. Having lived in seven countries and been lucky enough to visit close to 50, you learn a lot about traveling and how to connect with people on that level.Me personally, I think the most powerful lan ...