The eusko is a regional currency used primarily in the Northern Basque Country of France to support local businesses and environmental sustainability. Launched in 2013, it has grown to become the largest local currency in Europe, with millions of units currently in circulation. Since it maintains a one-to-one value with the euro, users can pay for goods using a combination of paper banknotes and standard euro cents. Modern features such as digital payment apps and specialized credit cards have been integrated to make the system more accessible for its thousands of users. Each banknote features distinct Basque cultural imagery, ranging from folk dances to linguistic education, while incorporating security measures to prevent counterfeiting. Ultimately, the currency serves as a tool for economic solidarity, encouraging residents to invest directly back into their own community.