Stuff like "Actor 1 used Ice Volley!" or "Actor 3 is suffering from poison." I think you can change it in the engine's code, but I'm not 100% sure. So if you don't mind using plugins, Yanfly's Battle Core let's you change without doing all that digging.
That is the battle log, and you would need to do a script mod to change it.
I've moved this thread to JS/Plugin Support. Please be sure to post your threads in the correct forum next time. Thank you.
Your profile says you primarily use VX Ace, but you posted this question in the MV forum. Which one are you using? The answer will be very different. If you ARE using Ace, I'll need to move the thread again.
I'm so annoyed with myself...I can't get this code to work so it looks like I'm going the plugin route for a problem I should be able to do myself Great. Now I get to murder save file compatibility. Again.
Can't believe my code from four years ago is still working! Did some expansions, and...
In related news, I may have an update for my old Extra status window plugin ready. That is, once I manage to sit down and update the documentation... and the demo project...