Language and the euro European currency. Of other national Slavic languages using the Cyrillic alphabet, Macedonian, Russian and Serbian also use the spelling евро. Ukrainian uses євро and Belarusian uses еўра/эўра. In Catalan the official plural is the same as its regular plural "euros". The standard pronunciation of "euro" is . For the cent, the word "cèntim" (, plural "cèntims") is used, since historically this term has been used as the hundredth part of a currency unit. The fraction of the peseta was also called "cèntim", but it was withdrawn from circulation decades ago. In the Cornish language, euro is written "ewro" (like "Ewrop"
Optimum currency area rationale behind the creation of the euro is that the individual countries of Europe do not each form an optimal currency area, but that Europe as a whole does. The creation of the euro is often cited because it provides the most modern and largest-scale case study of an attempt to identify an optimum currency area, and provides a comparative before-and-after model by which to test the principles of the theory. In theory, an optimal currency area could also be smaller than a country. Some economists have argued that the United States, for example, has some regions that do not