This are just two ideas, don't know if one or both are useful to other users or even possible to implement.

The first is to use (semi-)automatic import scripts for information from sites like imdb.com , since it is very unpractical to do this by hand for a whole movie collection.
Maybe you could have a look at the tool "Ant Movie Catalog", it has solved this very good.

The other thing is probably not possible but would be very practical. My Samsung LE40c579 only plays the first audio track and there is not option to select the second one.
So if I have a movie with multiple audio tracks for different languages I either have to remux it each time or I have to keep multiple copies.
Is it possible to make Mezzmo stream not the first but one of the other audio tracks to the TV ?