When you pay online or in-store with a Soldo card, you always pay in the currency of the merchant and the amount will appear under Activity in your Soldo mobile app. At the same time you will also see the same amount instantly converted to the currency with which your Soldo wallet is funded.
So if your company is British and you buy something while travelling in Italy, you will see the transaction amount in Euro (EUR) under Activity in your Soldo account, along with the amount deducted from your wallet in Pound Sterling (GBP).