The issue of whether the correct plural form would be euri or euro remained open for a long time, predating the actual introduction of the currency and leaving a relative uncertainty among speakers. The Accademia della Crusca assigned to Severina Parodi, lexicographer, and to Luca Serianni, language historian, the task to give a response. They deliberated in favour of euri in 1999 with the motivation that “euro is a masculine noun”. But the issue was then re-examined many times.Finally, the consensus of the Accademia was in favour of invariability and appeared, with an articulate rationale, on issue 23 (October 2001) of La Crusca per voi (Gli euro e le lingue, (Italian)). The rationale was based on the fact that abbreviated words originating from a longer word (for example auto from automobile (car) or moto from motocicletta (motorbike)) do not have a plural form, as well as the fact that the word Euro is considered an abbreviation of the word Europa (Europe). In the 306th session of the Senate of the Italian Republic, December 18, 2002, an amendment to the financial act was proposed to adopt euri as the plural form for public official deeds but was quickly rejected
Common usage in the rest of the English-speaking world, where the euro is not the local currency, is to use the regular plurals. The media in the UK prefer euros and cents as the plural forms.