Researchers at Harvard University and Google found that the language was expanding by 8,500 words a year in the new millennium and now stands at 1,022,000 words. The rate of increase over the years is shown by the fact the language has grown by more than 70 per cent since 1950, according to the study. The previous half century it only grew by a tenth. But nearly half of the new words are not included in any dictionary and are dubbed lexical "dark matter". They are either slang or invented jargon. The findings came from the computer analyse of 5,195,769...