The EU has vowed on Monday to reach a quick resolution to the "linguistic-technical problem" raised last week by Bulgaria regarding the name of the bloc's common currency.
EU member states' ambassadors made the admission in an official declaration, which, together with a one-off spelling compromise, was enough for Bulgaria to withdraw its threat to veto the Stabilisation and Association Agreement between the bloc and Montenegro.
The compromise to write the currency name, "euro", using its international currency code "EUR" in the Bulgarian version of the agreement, is not a binding precedent for future legal acts, but Bulgaria was satisfied enough with the official admission that there is a dispute.
Bulgaria wants the currency to be spelt as it is pronounced in Bulgarian - "evro", but has met strong resistance from the European Central Bank, which insists that the name of the common currency must be the same in all the official languages of the EU.
"The declaration was approved without discussion and without reservations," a Bulgarian spokeswoman said.
Bulgarian Prime Minister Sergey Stanishev, who is due to take part in an informal meeting of EU heads of government later this week, has threatened to go as far as to veto the EU reform treaty in December unless the bloc accepts Bulgaria's demands.
Bulgaria's position is made stronger by the fact that the European currency is spelt "evro" in the Bulgarian-language version of the accession treaty the country signed with the EU.