Prior to ruleset 75, victors were allowed to replace any keyword with a theme specific one, not just “emperor” and “player”. I know Idle was replaced a few times (as an example, in ruleset 38, players were not “idle” they were “rotten”) and potentially there were others as well.

I think we might be safe fixing these on a per case basis when/if they pop up rather than try to write a rule that properly replaces them as they get pulled in, but it is something to keep an eye out for.

Also spiviak is still quite common in the old rules, but I think “Ruleset and gamestate” has us covered there.