"Uses aggregated data from the 2006–10 American Community Survey (ACS) to display locations and numbers of speakers of thirty languages commonly spoken in the United States."
This new edition includes: (1) an introduction detailing developments in the study of endangered languages since 1996; (2) a description of the phenomenon of language endangerment and the death of languages; (3) a short report on efforts to describe and record endangered languages; (4) a detailed overview of language endangerment and death in all parts of the world; (5) a section of maps.