All the texts for armor/attack type names are listed under - Text-General: "Type - |cffffcc00...". The entire list is sorted alphabetically, so just go to the Text-General section and look for the T's. To change the descriptions of the armor/attack types, then you still need to look under Text-General, but after that look for the name of the default type (for example, if you wanted to change the text for piercing attacks, you would look for: Text-General: "Piercing damage does...").