He misspelled a lot of words, deliberately. By the way, when you misspell a word in a code, you make it harder to decipher.
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Yup. If someone deliberately misspells words, if makes the encryption more opaque as you can’t use standard word frequency checks to try and identify common words in the cypher.
In all passphrases I use, there are intentional misspellings of really oddball and nonsense words.