Set audio languages for downloaded movies or TV shows in the Apple TV app on Mac
When you download a movie or TV show, the default audio language is the system language you set in macOS. You can download additional audio languages in the Apple TV app in Preferences.
Set which audio languages to download
In the Apple TV app on your Mac, choose TV > Preferences, then click Playback.
Select either High Quality or Fast Downloads from the Download Options pop-up menu.
Click at the bottom of the Download Audio Languages list.
Select a preferred language to add from the list, or search for a language using the Search field, then select the search result.
To remove a language from the list, select it and click .