Anyone has any other civs. That wants to be able to use this mod?
Yeah, it would be great to have Slumbering Coven and Shadow Council from Fall Under included, perhaps modified a bit to fit in with your other civics. It would also be good to have the whole thing compatible with Fall Under, if possible. This may perhaps be a bit too similar to Shadow Council, but how about Magocracy as well?
Also this is a minor issue, but I think that some of the standard civic names sound a bit funny. A few sound too historical, in my opinion, for a fantasy game. Here's some suggestions:
President: [trying to limit it only when have democracy or republic don't know how.]( +20% Great General, +3 exp. to new units, -20% war unhappiness, +30 culture in all cities, -2 unhappiness for slave market, +1 gold for unit support cost)
Sounds too modern... how about something like Ministerial Rule, or Doge Rule?
Proletariat: ( +25% cost from corps, +1 health for each city, workers build 25% faster, +1 hammer from lumber mill, +2 gold from pasture, farm and workshop)
Bourgeois: ( +20% culture, +1 gold from mines and quarries, +2 gold from plantations and wineries, 1 unhappiness from barracks and 1 happiness from slave market)
Without a fantasy version of Karl Marx... these
really sound out of place.

How about Labourer Society/Supremacy for the former and Merchant Society/Supremacy for the latter?
Liberal: ( unlimited bards, +20% birthrate and +25% growth to all improvements that grow, +25 war unhappiness, 1 unhappiness for not having liberal, +2 gold from town or village, -2 unhappiness from barracks, and -4 unhappiness for slaver's market)
An enlightenment term I don't feel fits either. How about Enlightened Society?
Nationalist: ( Workers build 25% faster, +50% growth for all improvements that grow, Lower military cost, no foreign trade, +2 happiness from national epic, +50% exp in borders, can draft 1 unit per turn[need to fix])
And again. How about Expansionist?
Fair and Market System: [thinking of a better name for it] ( 50% maintenance from distance of capital, 50% maintenance from number of cities, -15% gold and +20% culture in all cities, +1 trade route, +10% food and +20% gold from trade routes, +1 happiness from Carnival, Market and the Grand Menagerie, 10% gold from Markets, Carnivals, and 5% Gold all Animal Pens.)[/COLOR]
Trade Caravans? Or Travelling Merchants?
Mercantilism: ( -25% maintenance from distance of capital, Foreign corps have no effect, +5% food, +10% hammer, and +15% gold from trade routes, -10% research in all cities, +50% gold in capital +2 gold from plantation)
Free Trade: ( -25% maintenance from distance of capital, -25% number of cities, 1 sickness in all cities, +1 trade route, +25% gold from trade routes, spend gold for production)
How about Regulated Trade and Unrestricted Trade?
As I said, nothing huge, but there are some suggestions.

Great work nevertheless. One of the first things I thought when I started playing FfH and RiFE was that the civics were extremely limited, so glad to see someone take the initiative! Wish I could give you a hand, but unfortunately my modding skills are nonexistant.