The Volokh Conspiracy
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Apropos "ruscism," I thought I'd also note this other relatively new usage, seemingly pretty clearly from Tolkien.
Some Googling suggests there are some possible broader connections, e.g., to this Russia/Mordor item, but I can't speak to how common the usage was in the past. But right now it does seem to be a thing (e.g., here, here, and here).
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