2. Not everyone speaks english and this game is a world wide game.
And even among those who do, you see a whole range of dialects. Case in point, I am British, so I tend to stick with Oxford English, although I have been known to speak (Or is it typing?) in a Norwegian/Russian accent. In addition, I also tend to use a great deal of Navy language while in space, and Army language on ground. Sadly, not many people know the difference between Port and Starboard.