Identify which language you intended to change
TED’s help describes opening the profile, then Settings and Languages, with separate subtitle and localization choices. If the menus changed but the video did not, return to the subtitle choice rather than repeatedly change the app’s localization. Keep a note of the two values so that another person can understand the present configuration.
For an illustrative bilingual household, one viewer may prefer English menus and Vietnamese subtitles. Those are independent preferences, not an inconsistent setup. Decide whether the change should be a general default or only a temporary choice for one talk before altering the setting shared by the household.
Check whether the requested subtitles exist
The publisher qualifies the default with when available. Its subtitle help explains that some talks have not yet been translated into a requested language and gives a per-video language selector. Open the actual talk and inspect that list. A missing translation cannot be created by switching the preferred-language setting again.
If the intended language is absent, choose an available version that suits the viewer or find another talk with the required translation. TED’s search offers a subtitle-language filter. That is more productive than resetting the whole device or assuming that the speaker’s audio will be dubbed into the selected subtitle language.
Preserve a precise example if a setting still fails
Write down the talk title, official address, app version, default subtitle language and the languages shown on the item. If the language is listed but does not appear when selected, that is a different report from a language missing from the list. The distinction helps support investigate the correct behaviour.
Check the publisher’s current platform instructions if the interface differs from a screenshot in an older help article. Keep the talk and available-language list with any support note. That gives a concrete example of the missing choice rather than a general claim that every translation is unavailable.
Questions about this guide
Will changing TED’s App Language dub a talk?
No. App localization, subtitles and the spoken soundtrack are separate choices.