Oh, cool. Thanks rednoah.

Unfortunately, now some other files have issues.

audioLanguages printed unique languages, while audio.language will print them all.
If there are multiple streams with the same language the list will be "interesting" (reformatted for better comparison):

[...]
[Return ...

Hi,

I have trouble renaming a Movie in swissgerman (Language 'gsw') with the naming scheme:
Movies/{plex.name} - {audioLanguages}/{plex.name} {"{imdb-$imdbid}"} {audioLanguages} {"[$vf, $vc, $ac]"}
https://i.ibb.co/99SMhsw/filebot-gsw-bugreport-preset.png

The MKV in question has one ...