Analysis of information sources in references of the Wikipedia article "Γλώσσες και ευρώ" in Greek language version.
For reasons of legal certainty, the ECB recommends that the text of the proposed regulation incorporates in its normative part a provision confirming that ‘the spelling of the name of the euro shall be identical in the nominative singular case in all the official languages of the European Union, taking into account the existence of different alphabets.
The name of the single currency must be the same in all the official languages of the EU, taking into account the different alphabets. This is to ensure consistency and to avoid confusion in the single market. In all EU legal texts, the nominative singular spelling must be 'euro' in all languages ('ευρώ' in Greek alphabet; 'евро' in Cyrillic alphabet). Plural forms and declensions are accepted as long as they do not change the 'eur-' root. In documents other than EU legal texts, including national legislation, other spellings are accepted according to the various grammatical rules used in each language.
20.8 The euro. Like ‘pound’, ‘dollar’ [etc.] the word ‘euro’ is written in lower case with no initial capital and, where appropriate, takes the plural ‘s’ (as does ‘cent’):This book costs ten euros and fifty cents. However, in documents and tables where monetary amounts figure largely, make maximum use of the € symbol (closed up to the figure) or the abbreviation EUR before the amount.
For reasons of legal certainty, the ECB recommends that the text of the proposed regulation incorporates in its normative part a provision confirming that ‘the spelling of the name of the euro shall be identical in the nominative singular case in all the official languages of the European Union, taking into account the existence of different alphabets.