itch.io

You can make the dialogue the main character says go through a dumbing down filter. Adding verbal ticks like adding dude or bro at the start or end of sentences, adding "like" in a lot of places, adding "you know what I mean".  Replacing complicated words with simpler ones, perhaps by adding a four- or three-syllable limit working off a dictionary. Perhaps a bit too complex to make a good automatic filter.

That all just demonstrate that the character is dumb. I would like something that makes the reader/player feel dumb somehow...