The U.S. dollar is the currency most used in international transactions. Several countries use the U.S. dollar as their official currency, and many others allow it to be used in a de facto capacity. It's known locally as a buck or greenback.
The franc is the currency of both Switzerland and Liechtenstein. Its name in the four official languages of Switzerland is Franken (German), franc (French and Rhaeto-Romanic), and franco (Italian).
