From "decryption" to "translation"

[Anton]

Another operator that would be needed in a text is "of". Given how the MS begins: "Fachys ykal ar ytaiin", I wonder whether "y" might be candidate for that, because an annotation such as "Book of kal and of taiin...." would appear just natural, in fact in the old times it was common for a book's title to be quite lengthy, representing in fact its annotation.