Separate the desired offline track from the menu language
Changing a Mac’s interface language and preparing extra audio for a downloaded film are different tasks. Before travel, identify the exact audio language the viewer needs in the saved programme. Seeing that language in a streaming menu does not prove it was included in a completed local copy. Check the intended download preparation controls while a suitable connection is still available.
Use the documented prerequisite for adding languages
Apple says a downloaded item’s default audio language follows the macOS system language, with additional languages selected in the TV app’s Playback settings. Its Download Audio Languages list has an Add control. If that control is dimmed, Apple specifically directs users to choose a different Download Options value before trying again. The prerequisite is therefore not necessarily a missing subscription or a broken keyboard.
Prepare one recognisable sample
For example, a bilingual household can add the intended extra language, prepare an eligible short item and inspect its actual audio choices before downloading a large library. Check the programme itself rather than assuming that adding a preferred language creates a track for every title. Retain the original preference values if you need to restore the setup after the trip.
Verify the resulting copy rather than the preference alone
A language appearing in the preferences list is evidence of a chosen preparation setting, not proof that every saved film contains that soundtrack. Confirm the relevant downloaded item and selected audio while you still have time to correct the preparation. If the control remains unavailable after following the documented prerequisite, report the macOS version and exact Download Options value through Apple’s official route.
Questions, answered
What does Apple suggest when Add is dimmed?
Choose another Download Options value, then review the Download Audio Languages control again.