Altering Attack Type Names

In my current map, I want to have heroes have diffrent strengths against different elements, like MrChak's Element TD Survivor.

Ex. Hero has fire attack type; stronger against nature hero and weaker against water hero.

These types would replace the chaos, hero, normal, etc. damage types. Unfortunately, I have no idea how to change these names ( although I do know how to change damage percentages in the constants.) Very frustrating....

Advanced > Game Interface

All of your options are in there to play with at your whims.