Every new edition of a dictionary acknowledges new words created by popular usage, or in those coined in the past 20 years, by technology.
To google (verb) has been approved by dictionaries since about 2006. However, company names that are not trademarked risk losing them. To hoover, to xerox and the biro are examples of marketed names that became household words. Therefore, Google frequently demands that the word is trademarked when used.
2011 sees The Concise Oxford Dictionary celebrates its centenary, and to mark the event it has produced a new edition. Words like sexting, retweeting, jeggings and mankini are now officially in. These are examples of words being made by joining parts of other words together, like Jedward, the X Factor twins John and Edward Grimes (sex-texting, re-sending via Twitter, leggings and jeans, man’s bikini).
The internet also drives words-use change. For example trend was a noun; now as trending it is noun, verb or adjective, as in ‘something trending on the web’. And so it will go on. Today there are ten times the numbers of words in use in the English language, that the best educated people used in Shakespeare’s time!