Long is the time spent working on simple localization files, but now there is a simple tool to help with that: Acta Diurna Modding Tools (A.D Modding). being constantly worked on and developed A.D Modding will be solving the hassle of working with Paradox Interactive's files to streamline your alt history and modding needs.
No. It would take a a lot of dedicated time and there are already a few good tools to do so like Visual Studio extension HOI4 Mod Utilities by Chaofan Yang
Much later we will add it, we've started researching and test ideas behind this, but it is in the plans for the future.
Yes once Alpha 0.0.3 of A.D Modding Tool is finished the Github will be linked, and we would really like all the help we can get in expanding and bug fixing. Anyone who contributes will be given the Github-Contributor tag on our discord, and people who contribute major additions will be given OS-Dev Role
Alpha Version 0.0.1