Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
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The words ‘racecar,’ ‘kayak’ and ‘level’ are the same whether
they are read left to right or right to left (palindromes).
they are read left to right or right to left (palindromes).
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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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