Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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The United States does not have an official language.
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Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
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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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The equivalents of the English saying "That's Greek to me" are "This appears to be Spanish" (German), "This is Chinese to me" (Dutch), "It's German to me" (Philippines), "It's Hebrew" (Finnish), "It's Chinese to me" (Hebrew), "Sounds like Mars language/These are chicken intestines" (China).
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The word 'mortgage' comes from a French law term that means 'death pledge'.
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The Bible has been translated into Klingon.
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The Danish word for condom is 'svangerskabsforebyggendemiddel'.
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