I meant using the CK2 mechanics as a basis for diplomacy, with the interaction between characters allowing for interaction between foreign ministers, for instance?
Just because a game is made for a certain period, I would presume it can be changed to suit any other period if needed?
not really... I mean some of it may be incorporated but most of it not, but this hint does not really say it has to have CK2 elements so WW1 is still possible but more unlikely than other options