Here is an example of the Manifest file. If I have Deutsch selected as my preferred audio it still only ever plays English
#EXTM3U
#EXT-X-INDEPENDENT-SEGMENTS
#EXT-X-VERSION:7
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="AUDIO",NAME="Deutsch",LANGUAGE="de",AUTOSELECT=YES,DEFAULT=YES,URI="279172874453.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="AUDIO",NAME="English",LANGUAGE="en",AUTOSELECT=YES,DEFAULT=NO,URI="279172874454.m3u8"
