Set audio languages for downloaded items
When you download an item, 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.
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 .