Religious movement in Europe at the end of the Middle Ages. Although there were differences in the interpretation of scripture among the Protestant Reformers, Luther, Calvin, and Zwingli, they were agreed that the inter-testamental (deuterocanonical) works included in the Apocrypha were not to be regarded as part of scripture (and Luther also rejected the epistle of James from his inner canon as lacking explicit reference to Christ). They also insisted that scripture should be regarded as canonical in the original languages of Hebrew and Greek. This principle demoted the Latin Vulgate and its occasional mistranslations. But it was fundamental to the Reformers that scripture should be available in the vernacular, and that Christian beliefs and traditions were subject to the overruling authority of scripture.