Simplify the following text for a Grade 11 native English-speaking person.
Original: The Augsburg Confession , also known as the `` Augustana '' from its Latin name , Confessio Augustana , is the primary confession of faith of the Lutheran Church and one of the most important documents of the Lutheran reformation .
Simplified: The Augsburg Confession , also known as the `` Augustana '' from its Latin name , Confessio Augustana , is the most important confession of faith of the Lutheran Church .