Absolutely yes, for example the Asmalat Ovrir (Book) that you can found in the royal archives of Thais and say
"Asmalat ovrir gogenol amabat hulut a sese sokol. Gogenol faresmal a sese ican."
And looks like a code right?, well it is like the 99% of tibia and there is a consensus with this book that say
"... Look to Alistair grave
Name of Hellgate language
Use Solomon sarcasm as base..."
SO we have a loooooooooooooot of possibilities here, Alistair can refers to Alister Cropwell a npc in tibia that refers to a Alister Crowley and he was a occultist who liked to write messages in code
And "Name of hellgate language" obviously means Bonelord language "469"
and for the last "Use Solomon sarcasm as a base", well Solomon was a real life mage/occultist of (965-928 AC) who wrote a VERY curious book named "solomon's clavicles" with A LOT of spells and things of demons so WHO KNOWS, in this book can be the missing piece of the bonelord language heheh