How do I determine a program’s currency and country of origin?

Each advertiser’s program on Ascend displays the country of origin’s flag in the interface next to the program name.
Additionally, publishers can filter advertiser programs by currency under Advertisers > My Advertisers/Find New Advertisers.

Note that publishers can still promote advertisers in a different currency, should they share a common consumer audience. Currency will be converted and paid to the publisher in the currency associated with the publisher account.