Yeah, thanks. After some further digging I found out what you already stated - there is no language info for the audio in this file. Dunno whether this came from converting the sample?
However in the case of unknown languages MC20 simply displays NO language name at all (just tested it) - so the streams are "1" and "2". That's maybe the least ugly solution instead of "unknown" or even any unknown foreign language names
So if this would be the case - i.e. the audio streams have no language ids at all - is there any batch tool you know of which allows to quickly and easily change this for hundreds of files? So that I could say something like: always label audio stream 1 as "German" and audio stream 2 as "English"? And then write the audio stream ids into the file without actually recoding anything else (so that it's quick)?
Technically it should be possible but is there an easy batch tool for something like that?