You touch up to 8 willing creatures. You and each creature affected by the spell gain the ability to speak in a secret language that's heard as incomprehensible gibberish to all others for the duration. A creature unaffected by the spell can't understand the language, even with other magic like Comprehend Languages or Tongues.
When you cast this spell while within 10ft of a written message of 50 words or less that you see, you can choose for it to be permanently unreadable by any creature except for you, one creature you name when you cast the spell,, and any creature named in the message.
This message remains indecipherable even to spells as above, although Dispel Magic will remove the encryption. This message may be written in any medium you wish, and you don't have to be the original writer to obscure its true meaning.
* - (a small bone whistle)
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