https://www.curseforge.com/minecraft/mc-mods/crackers-wither-storm-mod
The official repository for Cracker's Wither Storm Mod
The mod is currently not open source, however translators can feel free to use the lang file included to translate the mod to other languages. Do note that the lang file may not translate everything in mod, mainly config descriptions.
To submit a translation, make a pull request
To submit a feature, make an issue indicating that is as such
When submitting a bug report, include the version, a description of the bug, server and client logs if applicable, a screenshot, and steps to reproduce