What do you mean by "spend in the original currency?"

With other credit cards if you purchase something in USD or EUR, in order to make the purchase, the card will convert your card’s domestic currency to the foreign one at the exact moment of the purchase.

With the Loop card, you actually make the purchase in the foreign currency, meaning you will have 4 balances (USD,CAD,GBP,EUR). Because Loop Card allows you to pay back in the currency you spent in, you won’t have to perform any unwanted currency conversions.