Hi there. This actually wouldn't be too hard to implement, I think. I took a look at the Governments.xml file from the base game and the Expansion1_Governments.xml file from the expansion data, and really the only thing you would need to change to do this are the entries in the <GovernmentModifiers> and maybe <Modifiers> and <ModifierArguments> tables. All of the effects for the governments, in both the base game and expansion, are handled just through these tables. You would, of course, change the entries in the <Governments> tables to use the old text strings (or your own), so that the text in-game reflects the actual effects. The only thing that you might have difficulty with is the old percentage number in the governments UI, that your government used to have, and that used to show the maximum percentage you could get from legacy bonuses when choosing governments. For that, you'd likely have to change some of the base game .lua files, probably just the one, though, and you could probably copy/paste code from the old lua file to the new one, so it would definitely be possible.