All languages are works in progress. But English`s globalization, unprecedented in the history of languages, will revolutionize it in ways we can only begin to imagine. In the future, suggests Crystal, there could be a tri-English world, one in which you could speak a local English-based dialect at home, a national variety at work or school, and international Standard English to talk to foreigners. With native speakers a shrinking minority of the world`s Anglophones, there`s a growing sense that students should stop trying to emulate Brighton or Boston English, and embrace their own local versions. Researchers are starting to study non-native speakers` "mistakes"—"She look very sad," for example—as structured grammars. In a generation`s time, teachers might no longer be correcting students for saying "a book who" or "a person which." Linguist Jennifer Jenkins, an expert in world Englishes at King`s College London, asks why someAsians, who have trouble pronouncing the "th" sound, should spend hours trying to say "thing" instead of "sing" or "ting." International pilots, she points out, already pronounce the word "three" as "tree" in radio dispatches, since "tree" is more widely comprehensible.