Despite lacking the mainstream popularity of cards in those languages, the heightened demand for them might eventually cause more and more buyers, especially those who arent overly concerned about what languages the cards in question are printed in, to consider them for their own collections
It has the fringe benefit of being able to recover one of your banished dark monsters, so it pairs incredibly well with Gates of Dark World, and makes that effect preferable to Dark World Dealings
I do like that you can add Flair to the cards you like, making them look shiny or pretty, and that you can create showcases that other people can see your cards
Of all the colors, I do think that Black has the most options from which to choose, and there are plenty that could feature on this list
There is nothing you could do to Juzam Djinn to make it work with reprinting