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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Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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Stressed is Desserts spelled backwards.
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More people in Africa speak French than in France itself.
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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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