In 1526, the New Testament was translated into Swedish for the first time. It is not known who the translator was, but it seems almost certain that Olaus Petri and Laurentius Petri played an important role, particularly towards the end.
Title Page of the First Swedish Translation of the New Testament, Thet Nyia Testamentit på Swensko, Stockholm, 1526, in: Collijn, Isak: Sveriges bibliografi intill år 1600, vol. 1.: 1478–1530, pp. 331–339; source: Kungliga biblioteket, Stockholm, reproduction: Esbjörn Eriksson, Kungliga biblioteket - The National Library of Sweden.