Culture Flipping Cities - Flashing Flags

[Oddible]

So the game instructions / Civilopedia aren't exactly clear on if there is anything I need to DO to culture flip a city. I know I can force a flip with a Great Person but my question relates to when you see an enemy city and it has two flags in it and your flag is bigger than the enemy Civ's. Is there anything to do at this point? When I talk to my advisors they seem to suggest that I can encourage them to join our civ - but I don't see any way to 'encourage' (outside the aforementioned use of a GP). Am I missing something?

 

[PeteAtoms]

I think all you can do is increase the culture output of your cities, which are surrounding the foreign city.

You could also send spies to the foreign city and hope that you destroy some of its culture producing buildings, or maybe kidnap a great person.

Other than that, you just have to wait for your culture to overcome theirs.