Need Help With SubTitles

Hi Recently I discovered This Software.

I Really Love The Software Itself. The Encode Quality is Staxrip like !

The problem here is i can't have two Subtitles on one File

I need to have more than one Language on my MKV file.

I don't know if this is possible with this software, i haved try some Setting and nothing worked. 

I had the same issue with the audio but i ressolved it quickly.