Русско-англо-русский юридический словарь

Legal tender is any official medium of payment recognized by law that can be used to extinguish a public or private debt, or meet a financial obligation. The national currency is legal tender in practically every country. A creditor is obligated to accept legal tender toward repayment of a debt. (Investopedia)

In macroeconomics and modern monetary policy, a devaluation is an official lowering of the value of a country's currency within a fixed exchange-rate system, in which a monetary authority formally sets a lower exchange rate of the national currency in relation to a foreign reference currency or currency basket. (Wikipedia)

Ghana's central bank has introduced a string of foreign exchange controls in a bid to halt the depreciation of the national currency, the cedi, resulting from chronic trade and current account imbalances. (Financial Times)

A gold reserve is the gold held by a national central bank, intended mainly as a guarantee to redeem promises to pay depositors, note holders (e.g. paper money), or trading peers, during the eras of the gold standard, and also as a store of value, or to support the value of the national currency. (Wikipedia)