[Pharo-users] Adding a new reserved word

Hi everyone! I want to add a new reserved word to a Pharo image. I tried to find the code that gives special treatment to words like nil, true, false, self, etc. and add my new reserved word, but as though I tried to immitate some things, I was not successful. ¿What could be the right way to do this? ¿Can I add a reserved word just adding some code on a Pharo image? Thanks! Carla. PS: The object of doing this is nothing serious, I just want to make a friend laugh with a silly joke :)