How to keep more than one language? What about commentary streams?

[gbougiakas]

Hello,

thanks for the awesome app. Is it possible to keep more than one languages? If so how?

Second, what is going to happen with commentary streams.

I want to keep English. I have a French movie that contains French (which is fine) and English commentary (if I open it with VLC it says that English is commentary - it is somewhere in the MKV metadata). Will this script leave me with just the English commentary?