The bags are not 'localized' anywhere, they are directly named where they are placed.
You can open the mod and open a level called 'XC_Dump' (that's the name I think, the level definitely starts with XC_ ;-) where you will find them in the item list. You have to rename them there.
The companion bags are there too but be aware that the named bags are assigned to companions in a fixed order. This is done with Osiris. If you rename those bags, you might have to edit the Osiris code or deal with the outcome.
