There are around 41,806 different spoken languages in the world today.
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There is a 600 year old 240 paged book called the Voynich Manuscript, that’s written language is still completely unknown today.
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In 1700s, the deer skin was a common medium of exchange between the trading settlers and the native Red Indians in America. This is how a buck became a slang for a dollar.
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The word 'mile' is derived from the Latin word for 1,000 - the number of paces it took the average Roman!
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Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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