only brought one line/concept out of dreams with me this morning (so far; I might remember more later), but it's a doozy.
"It is a jealous language, and those who learn to speak it slowly lose the ability to speak any other tongue. And it always calls them home in the end, usually sooner than later."
that's... kinda awesome, and kinda terrifying, and I want to write a story about it now. :D