Since that the world looks different from country to country in culture, language and economics - accessiblity and simplicity has been the primary idea for the design for the currency, There is no text on the values exept the symbol of the currency and numbers (that works and looks the same in the whole world) for everybody to read and understand them.
The font that is used for the currency is "Noto", by Google. It is avaible in 800 different languages.