[Rika Chiya]"If the dialogue is recorded in Mono, it can be exported in stereo by putting the mono tracks on each of the L & R channels, is that correct?"
Yes. This is the "standard way of doing things" for dialog that isn't going into a surround sound track (5.1, 7.1, ect.). For example, if your aim is to create a video with a stereo sound track, sending your mono dialog track to L/R of the stereo sound track will create a "phantom center channel". That is, the dialog will sound like it's coming from the mid point between the L and R speakers. Typically that's exactly what you want.