Three Books on Language, The Washington Post (October 17, 2010).

1 The Last Speakers: The Quest to Save the World’s Most Endangered Languages, by K. David Harrison (National Geographic, $27).

2 The English Is Coming! How One Language is Sweeping the World, by Leslie Dunton-Downer (Touchstone, $24).

3 Through the Language Glass: Why the World Looks Different in Other Languages, by Guy Deutscher (Metropolitan, $28).