The song "Unst boat song", as far I know, is in norn (old language of Shetlands, close related with foroyar and icelandic).
I know the version of Hom Bru in the album "Obadeea"
The lyrics are:

1.- Starka virna vestalie,
Obadeea, obadeea.
Starka virna vestalie,
Obadeea monye

2.- Stala, stoita, stonga raer;
Oh, whit says du da bunshka baer;
Oh, whit says du da bunshka baer;
Litra mae vae, drengie.

3.- Saina papa wara,
Obadeea, obadeea.
Saina papa wara,
Obadeea monye.

I don't know the translation. Does anyone know it?