@Arkium , In these cases, Nintendo gives you a heads-up on the game's detail page that says: "Import games may contain foreign language (audio and/or text) or other references that are unknown to consumers."Yes bomberman 94is on the American eshop but the game was only avalable on the PC Engine in Japan it was never brought to America for the turbo grafx that is why in game text is Japanese.
(but it doesn't look like WiiU USB Helper reads that far down the page)