I've not investigated that, I just wanted to say that I had never seen "tosach" in the plural although it's a common word. But if it is in FGB, it means that it does exist. But I think it's not common since I've never read it anywhere.

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

Yes, as I said, you may still be correct and although the plural exists, it might be better to consider the singular. I think it is something to refer to a native speaker, if possible.

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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).

Is there a specific part of this forum website where I would be able to find a native speaker? I'm having a hard time confirming Na Tosaigh Nua as the correct translation of "New Beginnings".

Is the phrase "new beginnings" not a bit convoluted in the first place? If something is only beginning then it's already implied that it's new. I know Gaeilge can be a wonderfully tautological language, but this phrase doesn't feel right to me...
/ramblings

For a twist on the translation, I'd offer "breitheanna nua", with "breith" (meaning birth) acting as a metaphor for this beginning.

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Ag lorg cómhra as Gaeilge? Bígí linn - http://www.foramnagaeilge.com

Not really. Everything has a beginning. Beginnings happen all the time, but only the ones that happened recently are "new". My beginning happened a long time ago. But I can always make a "fresh start" in certain aspects of it.

Athbhreith "Rebirth" and athbheochan "revival" also come to mind - but then they wouldn't apply to a baby (unless you are Buddhist or Hindu.)

Breitheanna nua may do the trick.

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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).

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