Mileage claims can be added via web and mobile. Mileage rates are predefined in the settings and based on company and government rules (the setup is done per branch/ entity).
Mileage rate follows one currency. If you need to add another mileage rate in a different currency, a new mileage rate is needed.
Learn how to create a new mileage rate here. Select a different currency in this mileage rate.