If you have trouble reading important messages when you play, or these letters look very similar to each other. Try this plugin.
Tiny addon (5kB in memory) what allows you to use OpenDyslexic 3 font for World of Warcraft
Tested with
-ElVUI
-Plater
-Details
-Wim
-Prat
-IsToast
-DBM
-Kaliel's Tracker
After install just go to your UI addon of choice and open the font section. You should see two new fonts
Open dyslexic regular and Open dyslexic bold
Remember, this font is big, so use smaller font sizes to fit with your old UI.