Which change to Christian church practices was suggested by Martin Luther? installing statues of saints in churches increasing the sale of indulgences saying the mass in Latin so the faithful would hear it printing the Bible in the vernacular so all could understand it

Martin Luther suggested printing the Bible in the vernacular so all could understand it. He believed that everyone should have access to the scriptures in their own language, which would allow them to read and interpret the Bible for themselves. This was a significant change from the existing practice of using Latin, which many laypeople did not understand.