Tá sé fíor (ach bhí orm é a 'google'!)

Fíor nó bréagach: Is é Muir na Breataine an t-ainm ar an muir suite idir Éire agus an Bhreatain.

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Bump!

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Tá sé bréagach mar An Muir Éireann an t-anim é.

(Can someone explain why it's not "is anim duit"?)

Fíor nó bréagach: Is i mBaile Átha Cliath an contae is lú in Éirinn.

Although it is pronounced as though it were spelt anim*, the correct spelling is ainm.

Muir Éireann doesn't take the article an.

I'd say either:

Tá sé bréagach mar "Muir Éireann" is ainm di.

or

Tá sé bréagach mar (is) "Muir Éireann" an t-ainm atá uirthi.

But that's only an intermediate level correction. Wait for confirmation or correction from more proficient speakers. (Should be correct according to Graiméar Gaeilge na mBráithre Críostaí 9.21?)

(Sorry for the interruption, keep on with the game as Caoimhín has the answer correct. )

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Múinteoir Gaeilge - Irish Teacher
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect, but I can also speak Ulster and Munster Irish with native-level pronunciation.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), Gaeilic Uladh (GU), Gaelainn na Mumhan (GM), agus Gaeilge an Chaighdeáin Oifigiúil (CO).

Ní hé Baile Átha Cliath an Contae is lú in Éirinn. 1. Is cathair í Baile Átha Cliath. Is contae é Átha Cliath. 2. Is é Co. Lú an contae is lú in Éirinn.

Fíor nó bréagach. I logainmneacha/placenames in Éirinn, 'cill' means 'tree'.

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