As an American company, our missions are paid out in the United States Dollar (USD). That means that when we send the payment to you via PayPal, your reward will be converted into the currency you have set as your PayPal default.
However, rewards for missions can sometimes be listed under different currencies. It all depends on the mission. If you don't remember the advertised reward for a particular mission, check out the mission card to figure it out. If the reward is listed in a different currency, it will be reflected on the mission card, as advertised below.