"Look, two sisters."
Translation:Seall, dà phiuthar.
Depends whether lenition is mandated or not. phiuthar is the lenited form of the word. Dà always lenites, but there are lots of other situations which lenite the word too.
If you haven't seen the tips and notes for the various skills they're collected on one page here. https://duome.eu/tips/en/gd