Not quite Ransack means to search a place in a violent and careless way whereas sack means to steal all the valuable things from a building, town, etc., and possibly destroy the building or town, usually during a war.
Anyways not sure what you mean exactly but i presume you want the Sack Option text to be changed to Ransack, Right?
If that's the case then download this and put the 3 files inside the data\text folder of your mod or vanilla game.
After that open the strat.txt file and locate this code and change it so:-
Code:
{SMT_SACK_SETTLEMENT}Sack Settlement
to
{SMT_SACK_SETTLEMENT}Ransack Settlement
Also Mod workshop is the right place to ask for modding related questions not here hence:-