Because of a discussion in a topic with a user of App Inventor that is also Dyslexic i searched for a Font type that could be used for the Maker Cards,
I found the OpenDyslexic font https://www.opendyslexic.org/
I transformed my Maker Cards so they used the OpenDyslexic font. Because of the fact that OpenDyslexic uses a lot of whitespace i had to change the size of the cards.
You can find the png, pdf and odg files here for you to use or if you want you can translate them into your own language.
The App Inventor development team is interested in using OpenDyslexic as an option in the designer and block editor.
If you want to use OpenDyslexic font with App Inventor you can use this Chrome Extension.