Text replacement is a standard technology on mobile devices.  Each dictionary combines common spelling errors with contact names and some logic based on what keys are near other keys.  I enjoy cursing, so I got around fuck turning into duck and shit turning into shirt by adding fuck shit as a contact.  Joe has an Android device which goes the extra step where okie turns into pliers.  So, if you ever get a message with the text of pliers dokie, you know why.

On my first phone, attempts to type cool were replaced with book and I think the following phrase will pop up to confound future linguists.  “That’s ducking book, pliers dokie”.