Lleuwen’s distinctive jazz voice and bluesy-folk compositions enchant and enthral audiences. She works with the Breton bassist Vincent Guerin, with whom she made the album Tân. The album was awarded ‘Album of the Year’ for France 3 TV's FR3 Awards yn 2011. Lleuwen also won Liet International for one of her Breton language songs Ar Gouloù Bev. Aderyn Lapous is a song in Welsh and Breton, with many of the words in the song sharing the same sounds and meanings in both these Celtic languages. It is an exploration of heritage, inspired by the proverb, "Each bird has its song, each tribe has its language".