Library · The Thirty-Nine Articles
Article XXIV. Of Speaking in the Congregation in such a Tongue as the people understandeth
It is a thing plainly repugnant to the Word of God, and the custom of the Primitive Church, to have public Prayer in the Church, or to minister the Sacraments, in a tongue not understanded of the people.
Text from Philip Schaff, The Creeds of Christendom, volume 3 (1877), at the Christian Classics Ethereal Library. Public domain.