[kaffekask]

Here is how you can identify which tracks have English audio and Swedish subtitles.

Code:

mkvmerge --ui-language en --identify-verbose "D:\input\Somefile.mkv" | find /i ": audio (" | find /i "language:eng"

mkvmerge --ui-language en --identify-verbose "D:\input\Somefile.mkv" | find /i ": subtitles (" | find /i "language:swe"

Then you just need som logic to handle answer and get the track numbers and then make the command which should loke something like:

Code:

mkvmerge -o "D:\output\Somefile.mkv" -a 1 -s 4 "D:\input\Somefile.mkv"