Saving/restoring an earlier game state

[Rocket Science]

After a few days of tinkering around, I managed to get multilingual support working in a barebones game. Basically I can write this:

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say violet l_string("t-01", "foo")

and the game will output the string assigned to persistent.lang.strings["t-01"]["foo"], as if I'd written:

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violet "{b}{i}This is a test!{/i}{b}"

which works great, until you save the game, restart, change the language and load the saved game.

The problem is that any onscreen text from when the game is saved remains unchanged, because it's not refreshed until you rollback to it. As a workaround, what I want to do is hijack the load/save system so that it either saves the game state from when the text was last cleared, or loads the game and resets to that point (for the record, I'm working in NVL-mode). I don't see any easy way of doing that, though, so...help?