I think Lúghaidh meant "quant à moi"

Oops... maybe I should have spent less time trying to learn Corsican and focused on the French while I was out there...

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Bonghjurnu Cumu và ? Và bè ?

Ma 91 un hè Corsica... un capiscu micca...

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A language belongs to its native speakers, and when you speak it, you are a guest in their homes.
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And dom can be dómh in parts of Ireland, and domsa can be dómhsa. Just in case the OP hasn't seen those.

As far as I know (not very far) the fact there is an emphatic suffix means that the English style of raising your voice for emphasis is not the way in Irish. Is liomsa é - is emphatic enough to not require shouting. In English, it's MINE requires you to get aerated! [I nearly wrote "aereated", but that is not recognised as word in the dictionaries, but in line with our dialectal enthusiasm here seems to be what many people say... ]

Irish, Welsh, Breton, French and Portuguese as part of a "Western Atlantic linguistic area" (WEHR 1998, 2001)

Features:
- grammaticalization of copula (reduction of inflection/concord)
- weekly polysythetic
- phrase accent, 'mot phonétique', emphasis of single words through stress accent impossible
- extensive use of cleft constructions for pragmatic purposes
- Due to Celtic substratum?

http://www.fachtagung.dk/handouts/110.pdf

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That one's a bit of a push... Portuguese and French aren't particularly special in this regard as most of the Romance languages (languages descended from Latin) approach emphasis in a similar way. Most of these languages have optional pronouns that would be dropped in "mé"-like situations, but included in "mise"-like situations (some boundary cases vary). French isn't "pro-drop" in this way (because while the others conjugate verbs to indicate person and number, spoken French has lost a lot of this, so the pronouns have become mandatory for clarity), but it's still easier to justify the emphasis-by-word thing as a feature of the language family than a borrowing from Celtic.

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A language belongs to its native speakers, and when you speak it, you are a guest in their homes.
If you are not a good guest, you have no right to complain about receiving poor hospitality.

Maybe est-ce que is being interpreted as a copula fronting - although to say that French was similar to Irish in this respect would seem to be a huge stretch.

I'd list that one under "grammaticalisation of copula", the first item on Jay Bee's list.
All questions in Irish have an implied copula -- hence the use of conjunctions before the main verb.
The French "est-ce que"/"Qu'est-ce que"/etc construction is one of only 2 Celtic-like features of French that I haven't encountered in other Romance languages. (The other being "à" (="ag") in possession, but I'm sure I've read a non-Celtic theory for that one at some point -- I just don't remember what it was.)

_________________
A language belongs to its native speakers, and when you speak it, you are a guest in their homes.
If you are not a good guest, you have no right to complain about receiving poor hospitality.