The six official languages of the United Nations are Arabic, Chinese, English, French, Russian, and Spanish.
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Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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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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