This may be a bit painful, the quality of code can be very... Questionable, to say the least. However, if you like adventures, you are free to contribute to the project!
If you contribute, I ask of you to create merge requests based on testing branch. These can be merge requests for specific issues, but please use the testing branch as the base for your MR and a destination of your MR.
If you speak in other languages than English, you are more than welcome to. All you need to do, is grab the [translation template file](rcgcdw.pot) and fill out the empty strings under every English sentence. You can use software like Poedit or use your favorite text editor to do that. If you are looking for examples, you can look at [Polish translation](/locale/pl/LC_MESSAGES/rcgcdw.po). After you translate it, you can either send a merge request to the testing branch, or, if you don't know git [contact me directly](https://minecraft.gamepedia.com/User:Frisk#Contact) so I can do this for you.