So, playing the devil's advocate here, you're basically saying that the only thing that would fit in unreleased would be a proto...so why not just change it to prototype? Seems like it would solve more potential issues than not.
Common sense kind of swings me to my thinking that a translation of a released game would fall more closely in line with the unreleased category as it was technically released, albeit in another language. I'm obviously not talking about a rom hack that changed characters, etc, etc, etc as that would potentially change the game entirely.
I don't really care either way, just something to consider.