Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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In England, in the 1880's, 'Pants' was considered a dirty word.
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The P.S. at the end of a letter stands for Post Script.
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There are around 41,806 different spoken languages in the world today.
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The word "impossible" dropped in use by 50% over the course of the 20th century
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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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French was the official language of England for over 600 years.
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