Strange thing is ... it actually does remember the audio language on D+ for me ...... it hasn't done so yet ever on the Disney+ side.
sv_SE
en_US
en_GB
en_us
da_dk
sv
ro
fi
da
ja
en
es
it
It stores your most downloaded languages in the Windows registry.
HKEY_CURRENT_USER\SOFTWARE\RedFox\AnyStream\MediaPrefAudioLanguage
You could see what's hiding there.
For me this is my values:
Code:sv_SE en_US en_GB en_us da_dk sv ro fi da ja en es it
There's a list of languages - the leftmost have the highest priority (meaning: AnyStream thinks, you'll prefer the more left ones).