Very informative zine; I learned many things I didn't previously know about how the games industry handles localization!
Including the option to export a PDF is a great feature! One possible refinement would be to temporarily hide the navigation buttons while taking screenshots of each card, like so:
images:each card in range deck.cards
w:if card.index
card.widgets@("button1","button2","button3")
end
w..show:"none"
i:pdf.flatten[app.render[card] deck]
w..show:"solid"
i
end