mpv-jellyfin-shim does not follow alang settings in mpv.conf

[SinTan1729]

Describe the bug
I have the following line in my mpv.conf file.

alang=jpn,ja,ben,bn,spa,sp,ger,de,mal,ml,tam,ta,tel,te,kan,kn,hin,hi,per,fa,eng,en

This correctly selects the proper audio language for files opened directly in MPV. But when using this with jellyfin-mpv-shim, this does not work.

To Reproduce
Steps to reproduce the behavior:

1. Add the line in mpv.conf
2. Play something with foreign language audio.

Expected behavior
The audio language should be selected according to the list.

Desktop (please complete the following information):

• OS: Linux KDE
• Version 2.9.0

Error Messages
log.txt

There was an old issue #391 about this, but it was closed so I decided not to necrobump.