Do you want to speak more languages? Sure, as Sally Struthers used to say so often, we all do. But the requirements of attaining proficiency in any foreign tongue, no doubt unlike those correspondence courses pitched by that All in the Family star turned daytime TV icon, can seem frustratingly demanding and unclear. But thanks to the research efforts of the Foreign Service Institute, the center of foreign-language training for the United States government for the past 70 years, you can get a sense of how much time it takes, as a native or native-level English speaker, to master any of a host of languages spoken all across the world.