RobH_en_tn/jer/32/02.md

Jeremiah the prophet was imprisoned

This can be translated in active form. Alternate translation: "they were keeping Jeremiah as a prisoner" (See: rc://en/ta/man/translate/figs-activepassive)

Jeremiah the prophet was imprisoned

It is not clear why Jeremiah is referring to himself by name here. You may translate using first person, as the UDB does. (See: rc://en/ta/man/translate/figs-123person)

the courtyard of the guard at the house of the king of Judah

This was an open area attached to the king's palace that was surrounded by buildings and in which they kept prisoners.