im not a sci fi geek, but i thought about it when watching star wars. Earth is small planet with loads of different languages, but in the films say the planet "artilla" every one speaks "artillian" you know just one languge for a whole god damn planet, if our small world has got lot of different ones,with different accents, how come a different planet has one language and there accents are all the same, if there was a planet some parts in the past would not be able to be got to by certain people, e.g huge ocean in between countries, so the likelyhood of them every begining to evolve and talk the same as people hundreds of miles apart and never met or are gonna meet is very unlikely