ffmpeg -i video_with_russian.mkv -i english_audio.ac3 -c copy -map 0:v -map 1:a -c:s copy output.mkv
If you download the Prisoners English audio track separately, you may need to use a tool like to "remux" the audio with your video file. Prisoners Movie English Audio Track Download
There are several reasons why you might need a standalone audio file (usually in .AC3, .EAC3, or .DTS format) for this film: ffmpeg -i video_with_russian