Breton
| Breton | English |
| Excerpta de Libris Romanorum et Francorum | |
| The Leyde Manuscript | |
| Cartulaire de l'abbaye de Redon | |
| Vita Samsonis | Life of St. Samson of Dol |
| Vita Winvaloe | The Life of St. Gwenole |
| Vita Pauli Aureliani | The Life of St. Paul Aurelianus |
| Vita sancti Machutis | Life of St. Malo |
| Vita Mevenni | The Life of St. Meven |
| Vita Iudicaelis | The Life of St. Judical |
| lai d'Ivonet Omnes | |
| Dialog etre Arzur Roe d'an Bretounet ha Guynglaff | The Dialogue of King Arthur and Guynglaff |
| Mirouer de la Mort | The Mirror of Death |
| Am Mirouer a Confession | The Mirror of Confession |
| Doctrin an Christenien | Christian's Doctrine |
| Tremenuan an Ytron Guerches Maria | The Passion of the Virgin Mary |
| Pemzek Levenez Matria | The Fifteen Joys of Mary |
| Dismantr Jerusalem | The Destruction of Jerusalem |
| Amourousted an den coz | The Loves of Vieillard |
| Sonnet e brezonec | Breton Sonets |
| Buez an itron Sanctes Cathell | Life of St. Catherine, Virgin and Martyr |
| Burzud bras Jesuz | The Great Mystery of Jesu |
| Buhez mabden | The Life of Man |
| Hiniveles ar Mabic Jesus | |
| Creation ar bet | The Creation of the World |
| Horae Britonnicae et latinae | The Hours in Breton |
| Drama | |
| Buez Santez Nonn | Drama of the Life of Saint Nonn and Her Son David |
| Buhez Sant Gwenole | The Life of St. Gwenole |
| Buez Santez Barba | The Life of St. Barbara |
| Trajedienn santez Jenovefa a Vrabant/Buez sante Genovefa | The Life of St. Genevieve |
| An Pasion | The Passion |
| An Resureksion | The Ressurection |
| Later Collections | |
| Cantiques bretons (1642) | Breton Songs |
| An Nouelou ancient ha devot (1650) | Ancient and Devout Songs |
| Barzaz Breiz | Breton Ballads (partial translation) |
| Peronnik | Peronnik the fool (in French) |