Linguasphere (it seems intuitively obvious, doesn’t it?) refers to that realm of existence composed entirely of language. It does this in the same way that "atmosphere" or "blogosphere" do for their constituent parts. Right now "linguasphere" is used as a technical term
almost exclusively by a Quebecois linguistics outfit intent on cataloguing all the
world’s languages (The Linguasphere Observatory), but its usefulness is
hard not to appreciate. Linguasphere can also be used to describe the
broad language realm of a particualar language, e.g., "the Italian linguasphere."
"So I framed the word in my mind and then released it into the linguasphere."
"
People are getting so
sloppy about what they say that it's time we cleaned up the linguasphere."
"That word floats
high in the the English linguasphere."