A Growing Number Of Firms Worldwide Are Adopting English As Their Official Language

YANG YUANQING, Lenovo's boss, hardly spoke a word of English until he was about 40: he grew up in rural poverty and read engineering at university. But when Lenovo bought IBM's personal-computer division in 2005 he decided to immerse himself in English: he moved his family to North Carolina, hired a language tutor and—the ultimate sacrifice—spent hours watching cable-TV news. This week he was in São Paulo, Brazil, for a board meeting and an earnings call: he conducted all his business in En...