Many Prime Video titles include multiple audio tracks, including alternative languages or Audio Descriptions.
Open Prime Video app and play the video you want to watch.
Tap the screen and then tap the icon in the top right corner.
Here you can choose Subtitles and Audio in different languages. After choosing, tap Close.
However, for downloaded videos, the Audio are only available in 2 languages.
Hover the web player and click Subtitles and Audio.
Related:
Is there any way to prevent titles leaving Amazon Prime Video and keep them forever? Well, you can’t stop Amazon removing titles from its catalog but you can download your favorite movies and TV shows to MP4 and then keep them forever. So even after they are removed from Amazon Prime Video, you can still watch them offline on any MP4 compatible device. All you need is Pazu Amazon Prime Video Downloader.
Pazu Amazon Prime Video Downloader is a professional video downloader tool for users to download any movies, TV shows, originals, sport, titles from Channels as well as purchases&rentals to MP4/MKV in 1080p. After that you can play these movies and TV shows offline anywhere you ant without Amazon Prime Video app.
Features:
To get started, first you need to download, install and run the Pazu Amazon Video Downloader app on your Mac/Windows and sign in with your Amazon account.
Click the key icon and enter your registration code to unlock the full version if you have purchased a registration. If you haven’t, go ahead with the free trial version.
Start typing the name of the movie or the TV show. Now browse through the results and find something you want to download.
Or you can copy-paste the link of the TV show or movie. Click the search icon to find the TV show or movie you’re looking for.
Before starting to download anything, you’ll need to choose the video quality setting. To do that, tap the Gear icon to open Settings. It is easy to select the output settings at this step using video formats, video codec, audio languages, or subtitle languages.
For movies:
If the audio language you want is not in above Audio Language option, hover over the movie you want to download and click on the icon below to select the audio language you want to keep.
For TV shows:
Click 
icon next to it to select episodes you want to download.
Click 
to choose subtitles and audio tracks for each episode. Audio and subtitle languages in Settings only shows the 6 common languages. Here you can choose any language from whatever the TV show provides.
Tap the download icon next to the movie or TV show you want to download.
If your selection is a movie, click icon next to it and the downloading begins.
If your selection is a TV show, click next to it to select episodes and then click Download button.
To find the content you’ve downloaded, click History icon on the top.
Download Amazon Prime Video movies and TV shows to MP4/MKV on your PC/Mac
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