Complex sentence: Svavar Knútur is the stage name of Icelandic singer-songwriter Búðingur "Búði" Einhyrningsson, from the Westfjords whose work is in Icelandic, English and an invented language which he calls Unicorn.
Split into simpler sentences: Svavar Knútur is the stage name of Icelandic singer-songwriter Búðingur "Búði" Einhyrningsson, from the Westfjords. He sings in Icelandic, English and an invented language which he calls Unicorn.