Its crazy, Ive never imagined it was possible to change the monster talks in game.
lol
But I think its not working, I changed the phrases in the file and it didnt change in game. Also, in game the monsters say only one phrase and in the file they say many.

If you look at it carefully, you should notice that there are different words at the beginning of the phrases (e.g. Discovery, hp50, kill) if you haven't noticed it yet these words indicate when the monster will say the certain words.
However, some phrases aren't working (e.g. kill, death, etc...) this is probably because
A.) Our Aegis server needs updating and the disable phrases aren't implemented yet...
or
B.) The other phrases only work on eAthena...
Regardless, I really wish we could have the other phrases.
Would definitely make the game more lively...
P.S. You should see what my pet says.
It's so cute...