For the language anon, I just assumed English ended up being based off of Alternian (phonetically) (since the trolls created the human universe) but because the trolls didn't go in we ended up with lots of other languages too, but the main four/eight still came from the 'Alternian' language group so they spoke the same language. As for text, I assume that's just Sollux's skills in making the computers translate or something.