MeTube: download original audio track of youtube videos

[roan-droid]

Hello, I recently installed MeTube but when I try to download a YouTube video, the downloaded video contains the audio track of the auto-generated subtitle reading. How can I download only the audio in a specific language? In my case, I would like to download the original audio of the content, which could be English if the video was made in English, or Italian if it was made in Italian. I've tried to modify the YTDL_OPTIONS value in the /opt/metube/.env file but every time I change something the application stops working.
Thank you for your help