I would rather go to see Rosie Stewart.
I once had the pleasure of sitting next to one of the Unthanks, when she was singing a song, I couldn't understand a word of what she was singing, however her voice was tuneful and pleasant in a little girly way, each to their own, personally being able to understand the words is of paramount importance.
If I was allowed to have the choice of the Unthanks singing in what I presume was the English Language , or a good IRISH SINGER, singing in GAELIC[a langauge I don't understand fluently]I would choose the latter.There is more to singing than just a pleasant voice.