never heard nor read that. Do you have evidence of that? (reliable stuff, of course...)

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

Go raibh maith agaibh.

Sorry, completely missed this last time around.

I have no sources for it, no—just actual language usage. When someone says físeán YouTube, for example, they just mean a YouTube video; they’re not implying that there is only one video on YouTube. Talking about photography, an old local (Irish-native) Gweedorian man once said to me that he had a seansplanc Nikon at home, and I very much doubt he meant that his was the only Nikon flash in existence.

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Not a native speaker.

Always wait for at least three people to agree on a translation, especially if it’s for something permanent.

My translations are usually GU (Ulster Irish), unless CO (Standard Orthography) is requested.

Maybe it's not the same with trademarks or Youtube. To me there's a difference.

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

I think the difference is more whether or not it’s an actual possessive function, or a more abstract use of the genitive.

If I say íomhá Microsoft, for example, it’s clear that I’m talking about Microsoft’s image, i.e., the only one they have. If I say is ríomhchlár Microsoft é Word, I’m not saying that Word is the only app Microsoft make, but I’m also not saying that it’s Microsoft’s app (i.e., that it is in the possession by Microsoft), just that it’s a Microsoft app. Had this been a definite entity, the sentence wouldn’t even have been grammatically possible.

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Not a native speaker.

Always wait for at least three people to agree on a translation, especially if it’s for something permanent.

My translations are usually GU (Ulster Irish), unless CO (Standard Orthography) is requested.

Anyone who speaks Japanese knows that the distinction between "definite" and "indefinite" is largely arbitrary and superfluous anyway.

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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 cineál aidiachta "Microsoft" in abairt mar sin, sin an tuige. I bhFraincis déarfaí "Word est un logiciel Microsoft" ar an dóigh chéarna.

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