The article explains why some countries borrow money in their own currency while others borrow in foreign currency. When a government can control its own money, it's easier to pay back debts if the value of the money changes. But this also makes it tempting for the government to print more money, which can lead to problems. Countries with less trustworthy money policies tend to borrow in foreign currency instead. This helps them avoid the risks of their own currency losing value. Overall, borrowing in local currency can help governments make better decisions about money, but only if they can stick to their plans.