Is it possible to edit in game messages?

[Maeran]

Can the images and text in such messages as a son's coming of age or the declaration of war be changed? I suspect it might be impossible, but I'd like to do it if it is.

[Foot]

You can find the messages in EB/data/text I can't remember the exact files, but a little bit of common sense and searching should find them.

You can't change the texts for individual factions in most cases, the messages are defined by culture. So all the factions in the barbarian culture would use the same message for any particular event/

Foot

[blacksnail]

It's the event_strings.txt file for the text, and the event_titles.txt for the corresponding titles.