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With about one and a half billion non-native speakers, English has become the world's own language. Such dominance has its downside, of course. There are now about 6,800 languages left in the world, compared with perhaps twice that number back at the dawn of agriculture. Thanks in part to the rise of über-languages, most importantly English, the remaining languages are now dying at the rate of about one a fortnight. Want to learn Busuu, anyone? Then you'd better head to Cameroon fast, before one of the language's last eight speakers kicks the bucket (as the Busuu-nese presumably doesn't say).