From Will:

That Chíonn is an alternate form of Feiceann, found widely in the North, but also used by some Munster speakers.
It’s a bit odd to see nach bhfeiceann in the same utterance. In class, I observed that I haven’t run into forms like Nach gcíonn at all, but Dineen’s dictionary says that that can happen.

Nonetheless, other sources indicate that modern usage is to use feic- forms with particles. That is, Chíonn sé,
but Ní fheiceann sé.

• Gender ts marker on an tseoid
• three is uses, two for superlatives and one for the copula
• irregular comparative áille
• dofhála (“unobtainable”, “rare”) – negative based on verbal adjective, more usual form would be dofhaighte