I own a physical release of Splatoon 2 on my Nintendo switch. The cartridge is European but I am playing the game on an American account. I wish to buy the octo expansion. My main concern is this:
1)If I buy on the USA eShop, will I be able to play the dlc on the EU cartridge?
2)If I buy on the EU eShop, will I be able to play the dlc on my US account?