This fork is not maintained. It was developed to add custom keywords into ruby interpreter.
These is now handled by a preprocessor - https://github.com/betacraft/keyword-parser
You can try out the work here - http://code4all.betacraft.co/
Other relevant repos - https://github.com/betacraft/rubyvernac-hindi, https://github.com/betacraft/rubyvernac-marathi