Hello can I post this here?

Hello. I would like to know if I need to click on "all languages" or just English in the DVD Shrink properties? I am having trouble with getting my movies to do right. one has english subtitles with the people talking english. and the other one has two people saying what the on-screen people are doing and saying with the on-screen people's voices are inaudible. I don't know how to fix it. thanks, kathy