Can I ask you what you mean with "editing the sav file"? Did you Just write the words in the save file in a specific Place or have you done something else?
You can use a hex editor like HxD to open the file and near the bottom you'll find an English string depending on which part of the game you're at. New saves don't have these strings, so you'll have to get to another scene like the void room with the hidden paths (the string will be "The Time") and edit the file then.