The Gutenberg Bible primarily used Latin.
Johannes Gutenberg’s Bible, produced in Mainz around 1454–1455, was a printed edition of the Latin Vulgate Bible. It is widely regarded as the first major European book produced with movable metal type, although printing had earlier histories in East Asia and manuscript and block-print traditions existed elsewhere.
The text followed the Vulgate tradition associated with Jerome, which was the dominant Bible version of the medieval Western Church. The book was printed in a blackletter style designed to resemble high-quality handwritten manuscripts. Many copies also received hand-painted initials and decoration after printing.
The Gutenberg Bible did not immediately make vernacular languages unimportant. Later printing helped expand access to German, English, French, and other translations, especially during the Reformation. The Gutenberg Bible’s historical importance lies in its production technology and cultural impact, not in being the first Bible in any language.