As for language, well, think about it like this. They've revealed themselves to millions of sentient races. If you've done something thousands of times, over and over again with a different and hard challenge, then would you not become so adept to it that it would begin to be as easy as a runner? If you ran a mile a day, then after thousands of miles, you wouldn't even be breathing hard, while the first many times, you'd have been sweating and panting halfway through, or when you finished.