It's so easy ... for example, define your dialogues like this: Hello, VAR1. And that have a file where you define what VAR1 is. For patreon game, VAR1 = some random name. For the incest patch ... VAR1 = Mother.It seems very strange to me, almost impossibile. It would mean that the incest patch has all the future updates text inside its folders. One could kown the end of milfy city just by opening the incest patch folder...
You can expand from here.