Actually, I have no clue what movie theatres even exist in Bonn, since I don't often go to the cinema but I know there's one in Cologne (haven't been to it but it looks close to the hbf) that actually plays English movies.
As far as I am aware, the only cinema in Bonn that regularly plays movies with their original sound is
Kinopolis in Bad Godesberg. Look for "O-Ton" or "O.m.U." in the left column. (The latter means subtitled original sound.)