From Smithsonian.com, Four Things That Happen When a Language Dies
The most profound piece of writing on the subject? David Malouf's short story, "The Only Speaker of His Tongue",
"He is, they tell me, the one surviving speaker of his tongue..."
"When I think of my tongue being no longer alive in the mouths of men, a chill goes over me that is deeper than my own death, since it is the gathered death of all my kind".