Maybe a config would be best but I've no idea how much effort it is
I don't think it's currently possible for mods to make settings options for changes that are made to localized lines of text. It's easy to implement those to "conventional mods" but here there's no code interaction with these ones, the game just automatically swaps a line you give it and that's it, you have no control over which and when.
Btw, are you using some custom graphics for elevated rails on your screenshot in that thread you linked? They look quite different. Is that a mod? Can you share a link to it?