I saw this on Dicebreaker today – Tabletop RPG Inspirisles will teach you sign language: https://www.dicebreaker.com/games/inspirisles/news/inspirisles-learn-sign-language-rpg
Inventive tabletop RPG Inspirisles will teach you sign language as you play, with players using ASL and BSL to cast spells in a Celtic-inspired fantasy worldhttps://www.dicebreaker.com/games/inspirisles/news/inspirisles-learn-sign-language-rpg
This was a Kickstarter campaign – https://www.kickstarter.com/projects/tatteredbear/inspirisles/. Here’s the Kicktraq report: http://kicktraq.com/projects/tatteredbear/inspirisles/. The goal was £1,200 and they raised £31,501. It uses DriveThru RPG (DTRPG) for print on demand books.