They "can," but they're not supposed to be.

Redwolf

We are indeed.

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It is recommended that you always wait for three to agree on a translation.
I speak Connemara Irish, and my input will often reflect that.
I will do an mp3 file on request for short translations.
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The CO can supposit whatever it likes.

Generally, "foreign words" are uninflected (or inflected according to the original "donor" language) in most languages as long as they are still considered "foreign" concepts, but are inflected according to the rules of the new language once they become accepted and assimilated into the new language, at which point they become "loan words".

(http://en.wikipedia.org/wiki/Loan_word# ... l_currency)

In Connemara, "foreign words" are simply being adopted as "loan words" faster than in some other dialects.

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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).

Yes, foreign words are lenited in Connacht- Bicycle for example

Brand names are not inflected generally unless the sound demands it. It's arbitrary.