No - the currency of the Republic is the Euro
Derry is in Northern Ireland where the pound sterling is the currency.
The British pound, sterling. Unlike the rest of Ireland where euros are used, northern Ireland uses sterling as it is part of the UK.
The Euro , although British Pound Sterling is used in Northern Ireland.
Before adopting the euro, Ireland used the Irish pound (punt) as its currency. The Irish pound was introduced in 1928, replacing the Irish pound sterling. It was in use until 2002, when Ireland transitioned to the euro (€) as part of the Eurozone. The euro has since become the official currency of Ireland.
The Republic of Ireland is often used, but the official name is Éire in the Irish language and Ireland in English. Southern Ireland is an incorrect term. In fact the most northerly point on the island of Ireland, is not in Northern Ireland, but actually in what many people call southern Ireland. So "Southern Ireland" is an incorrect term both as an official name and geographically.
The Republic of Ireland uses the Euro. Sterling is just used in Northern Ireland. The sterling used there can be used in England. However the notes are slightly different looking, as would be the case with the notes in Scotland.
Carrauntoohil is the highest mountain in all of Ireland. It is geographically in southern Ireland. The term "southern Ireland" is often incorrectly used to refer to the Republic of Ireland. Carrauntoohil is in the Republic of Ireland.
In the Rupublic of Ireland the currency is the EURO, and in Northern Ireland (UK) the Pound Sterling is the currency
English is the main language spoken in Ireland. Irish is also an official language, but not many speak it fluently, though there are parts of the west of Ireland where it is the main language.
Dublin is the capital of the Republic of Ireland, which sits on the southern three-quarters of the island of Ireland. The term "Southern Ireland" is often incorrectly used to refer to the Republic of Ireland. "Southern Ireland" is not an official term, and it is often used to distinguish the Republic of Ireland from Northern Ireland. As it happens, the most northerly point on the island of Ireland is actually in what people refer to as "Southern Ireland" See the map below, which shows Northern Ireland as the grey area. You can see that the most northerly point is in county Donegal, which is in the Republic of Ireland, which people incorrectly refer to as "Southern Ireland":Dublin
The currency used in Belfast and the rest of Northern Ireland is the pound sterling, as Northern Ireland is part of the UK. if you are travelling from England, Scotland or Wales you would be best going into Your bank and asking for Northern Irish Sterling because some shops will take the English Money but others wont. Down in the Republic of Ireland they use euro.
Southern Ireland is often used incorrectly to refer to the Republic of Ireland and distinguish it from Northern Ireland, so southern Ireland is really just a geographical term, in the same way as you might have southern Canada or southern France or southern Argentina, or the southern part of any country you could mention. Even the term Republic of Ireland is not an official one. The proper name, according to the Irish constitution is Éire or Ireland. So, southern Ireland is in the country that is known as Ireland, which is on the island of Ireland, as is Northern Ireland.