I think everything inside the text files. For example the name of the shop or the custom names for the sharpening.
For example when I change the name from "McSloppy's Furnace" to "McPerfect's Furnace". On the savegames it will still say "McSloppy's Furnace" and on a new started game "McPerfect's Furnace".
For example when I change the name from "McSloppy's Furnace" to "McPerfect's Furnace". On the savegames it will still say "McSloppy's Furnace" and on a new started game "McPerfect's Furnace".