Yeah I know importing a game from the EU or US won't be a problem (apart from it costing extra money) but how about eShop games? I suppose they'll use a IP region or credit card to determine the region you are in, and thus the store allowed access to, so you can have games from multiple eShops on the same device/account?
TBH I don't understand why in console world such things are still an issue. All major games get world wide releases, devs and pubs know that even before they start working on the game so why isn't every game simply multi language? That's how it largely works on PC (though on Steam I do sometimes notice special Japanese version that are butchered in the language department for whatever reason. Though English is always there). I understand multi language voices might not be possible due to cart size or maybe even release dates but a subtitle option shouldn't be a issue imo.