Shakespeare invented over 1,700 words that we use today.
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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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Thinking in a foreign language makes decisions more rational.
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Floccinaucinihilipilification, the declaration of an item being useless, is the longest non-medical term in the English language.
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The Bible has been translated into Klingon.
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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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Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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