In Civ4, the residents of the cities of a given empire have "cultural" affiliation. So if I am playing as the Germans, I might see something like: Germans: 50%, Russians 25%, French 25% in a given city.
For sake of discussion, let's call the residents of your empire that are affiliated with a foreign culture as "foreign residents". (Note that I realize that this is not really correct either from the POV of a recently conquered city as they would not consider themselves "foreigners" but natives under occupation but let's use this term for simplicity sake).
As far as I can recall, there were only two game play mechanics that came into play. One is that in a newly conquered city, the foreign residents would "resist" and not be productive for a while. Another mechanic was that if you are at war with the foreign nation, residents in your empire with cultural affiliation of that foreign nation would be unhappy.
Now I have no idea what mechanic will be used for Civ5. I have so far not seen anything on this. But I would really hope that the game play depth and possibilities regarding foreign residents has been increased from Civ4.
One thing that I would like to see is for the foreign residents to not be so easily assimilated out. If you conquer a large nation full of "foreigners", it seems it would be more realistic for those conquered cities to continue to maintain the foreign culture for a really LONG time. Recall that when the Ottoman Empire conquered Greece and Arabia for instance, Greek culture and Arab culture did not just slowly die out but remained and even strengthened through the centuries!
Also "civics" and government policies should have an effect on an empire's "stability" and productivity. For instance, if you run more tolerant, "democratic" "civics" (or whatever its rough equivalent is in Civ5), you will see less trouble from cobbling together a large empire made up largely of "foreigners". If you don't you will see more trouble in various forms.
Another possibility would be for foreign residents to be able to stage rebellions. And for other nations to be able to support and aid said rebellions with money and troops. And for said rebellions to be able to succeed so that occupied nations can regain their independence. Again using the Ottoman Empire example of RL, think about the "Greek War of Independence" of the 1820s. With the help of Britain, France and Russia, "foreign residents" of Greek culture within the Ottoman Empire rebelled and re-established the independence of Greece.
This last mechanic would be both very realistic, increase game play depth and make the game far more "historically" immersive. It would also really model accurately the difficulty involved in trying to conquer and rule huge numbers of foreign lands. And it would serve as a check and counter to the "bigger is better" issue. With such mechanics, a large empire formed from oppressed conquered peoples might not always be better than a small but homogenous nation that doesn't have to deal with such problems.
These are some idea for expanding the game play possibilities of foreign residents. Again I have no idea what is in store for Civ5. Hopefully even if it is not in the default game that these kinds of things can be modded in later.
For sake of discussion, let's call the residents of your empire that are affiliated with a foreign culture as "foreign residents". (Note that I realize that this is not really correct either from the POV of a recently conquered city as they would not consider themselves "foreigners" but natives under occupation but let's use this term for simplicity sake).
As far as I can recall, there were only two game play mechanics that came into play. One is that in a newly conquered city, the foreign residents would "resist" and not be productive for a while. Another mechanic was that if you are at war with the foreign nation, residents in your empire with cultural affiliation of that foreign nation would be unhappy.
Now I have no idea what mechanic will be used for Civ5. I have so far not seen anything on this. But I would really hope that the game play depth and possibilities regarding foreign residents has been increased from Civ4.
One thing that I would like to see is for the foreign residents to not be so easily assimilated out. If you conquer a large nation full of "foreigners", it seems it would be more realistic for those conquered cities to continue to maintain the foreign culture for a really LONG time. Recall that when the Ottoman Empire conquered Greece and Arabia for instance, Greek culture and Arab culture did not just slowly die out but remained and even strengthened through the centuries!
Also "civics" and government policies should have an effect on an empire's "stability" and productivity. For instance, if you run more tolerant, "democratic" "civics" (or whatever its rough equivalent is in Civ5), you will see less trouble from cobbling together a large empire made up largely of "foreigners". If you don't you will see more trouble in various forms.
Another possibility would be for foreign residents to be able to stage rebellions. And for other nations to be able to support and aid said rebellions with money and troops. And for said rebellions to be able to succeed so that occupied nations can regain their independence. Again using the Ottoman Empire example of RL, think about the "Greek War of Independence" of the 1820s. With the help of Britain, France and Russia, "foreign residents" of Greek culture within the Ottoman Empire rebelled and re-established the independence of Greece.
This last mechanic would be both very realistic, increase game play depth and make the game far more "historically" immersive. It would also really model accurately the difficulty involved in trying to conquer and rule huge numbers of foreign lands. And it would serve as a check and counter to the "bigger is better" issue. With such mechanics, a large empire formed from oppressed conquered peoples might not always be better than a small but homogenous nation that doesn't have to deal with such problems.
These are some idea for expanding the game play possibilities of foreign residents. Again I have no idea what is in store for Civ5. Hopefully even if it is not in the default game that these kinds of things can be modded in later.