Repository: yt-dlp
Issue: [youtube] Getting AI Generated English Audio and not Original German Audio 
Labels: site-bug,triage,site:youtube

### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [X] I understand that I will be **blocked** if I *intentionally* remove or skip any mandatory\* field

### Checklist

- [X] I'm requesting a site-specific feature
- [X] I've verified that I have **updated yt-dlp to nightly or master** ([update instructions](https://github.com/yt-dlp/yt-dlp#update-channels))
- [X] I've checked that all provided URLs are playable in a browser with the same IP and same login details
- [X] I've searched [known issues](https://github.com/yt-dlp/yt-dlp/issues/3766) and the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues **including closed ones**. DO NOT post duplicates
- [X] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)
- [ ] I've read about [sharing account credentials](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#are-you-willing-to-share-account-details-if-needed) and I'm willing to share it if required

### Region

Germany

### Example URLs

https://www.youtube.de/watch?v=0j1jfNnvC6w

### Provide a description that is worded well enough to be understood

Hello everyone,

I've encountered a problem with yt-dlp that I couldn't find an issue for on GitHub, and I'm hoping someone here can help or that a feature suggestion might be possible.

YouTube now seems to automatically create AI-synthesized translations for the audio in some videos without this being explicitly selected by the user. As a result, when I download a video, I sometimes get the original audio and sometimes an AI-translated version (e.g. in AI English or German).

What I would like to see:
A way to save both the original audio and the AI-translated audio track in the final file (MP4 in my case).

Alternatively, a parameter with which I can explicitly specify that only the original audio is downloaded, if available.

Is there currently a solution for this in yt-dlp? If not, would it be conceivable to add such a feature in the future?

Many thanks for your support and best regards!
be kind to me this is my first issue at yt-dlp. if i have misunderstood or done something wrong i am sorry

### Provide verbose output that clearly demonstrates the problem

- [X] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [ ] If using API, add `'verbose': True` to `YoutubeDL` params instead
- [X] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```shell
[debug] Command-line config: ['-vUi', '--merge-output-format', 'mp4', 'https://www.youtube.de/watch?v=0j1jfNnvC6w']
[debug] Encodings: locale UTF-8, fs utf-8, pref UTF-8, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2024.12.13 from yt-dlp/yt-dlp [542166962] (pip)
[debug] Python 3.12.7 (CPython x86_64 64bit) - Linux-6.6.56-x86_64-with-glibc2.40 (OpenSSL 3.3.2 3 Sep 2024, glibc 2.40)
[debug] exe versions: ffmpeg 7.1 (setts), ffprobe 7.1, rtmpdump 2.4
[debug] Optional libraries: Cryptodome-3.20.0, brotlicffi-1.1.0.0, certifi-2024.08.30, curl_cffi-0.7.2 (unsupported), mutagen-1.47.0, requests-2.32.3, secretstorage-3.3.3, sqlite3-3.46.1, urllib3-2.2.3, websockets-13.1
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets
[debug] Loaded 1837 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.12.13 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.12.13 from yt-dlp/yt-dlp)
[generic] Extracting URL: https://www.youtube.de/watch?v=0j1jfNnvC6w
[generic] watch?v=0j1jfNnvC6w: Downloading webpage
[redirect] Following redirect to https://www.youtube.com/watch?v=0j1jfNnvC6w&gl=DE
[youtube] Extracting URL: https://www.youtube.com/watch?v=0j1jfNnvC6w&gl=DE
[youtube] 0j1jfNnvC6w: Downloading webpage
[youtube] 0j1jfNnvC6w: Downloading ios player API JSON
[youtube] 0j1jfNnvC6w: Downloading mweb player API JSON
[debug] Loading youtube-nsig.03dbdfab from cache
[debug] [youtube] Decrypted nsig WmBnQoh91Q992g4-- => ewOSNX6_X-fDcA
[debug] Loading youtube-nsig.03dbdfab from cache
[debug] [youtube] Decrypted nsig Jmo2hbQT5uSDhtb6A => u0BVpr4gVKWxbA
[youtube] 0j1jfNnvC6w: Downloading m3u8 information
[debug] Sort order given by extractor: quality, res, fps, hdr:12, source, vcodec, channels, acodec, lang, proto
[debug] Formats sorted by: hasvid, ie_pref, quality, res, fps, hdr:12(7), source, vcodec, channels, acodec, lang, proto, size, br, asr, vext, aext, hasaud, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] 0j1jfNnvC6w: Downloading 1 format(s): 401+251-1
[debug] Invoking http downloader on "https://rr3---sn-4g5lznek.googlevideo.com/videoplayback?expire=1734408141&ei=baNgZ5WAHdyDi9oPy4DLuQM&ip=2a02%3A908%3A186%3Ad8e1%3A7d3c%3A45d0%3A7ca6%3A4aaa&id=o-ANjbtrLyOSuZAts9U7kohTaiqANt4mBCkbojrV-_t3j7&itag=401&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&met=1734386541%2C&mh=_O&mm=31%2C26&mn=sn-4g5lznek%2Csn-5hnednsz&ms=au%2Conr&mv=m&mvi=3&pl=46&rms=au%2Cau&initcwndbps=2408750&bui=AfMhrI9PgPvSRYxWkPHOIigQ8rQBWzZsZ2rmsWCxGVxUhXtUxvfCbNggTAvq0GKtxUz2pCa4FdwIBLv2&spc=x-caUCvN89n9uqG7By22EofXAob8CVuPydGFKeDRFNrTqPRdgw&vprv=1&svpuc=1&mime=video%2Fmp4&rqh=1&gir=yes&clen=840583662&dur=1197.400&lmt=1731966797785699&mt=1734385993&fvip=1&keepalive=yes&fexp=51326932%2C51335594%2C51347747&c=IOS&txp=4532434&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cxpc%2Cbui%2Cspc%2Cvprv%2Csvpuc%2Cmime%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRAIgGB4IGn44ICYoe3Nxo0axsQJeUFd9uVNrFUf0SOMXXe8CIB-852qkRsJExcPjtL_YpaZSzXTEDV-lQC9b6agyPuGY&lsparams=met%2Cmh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Crms%2Cinitcwndbps&lsig=AGluJ3MwRgIhANfBW-y6_SjGWobpeEaXc7PBPoa_n6QW4zJBMEYXaIelAiEAoAJ5BaeNeNwlvZ9JHCvpCPUpCmdz6wCval_h3-_IbN4%3D"
[download] Destination: Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].f401.mp4
[download] 100% of  801.64MiB in 00:01:22 at 9.71MiB/s
[debug] Invoking http downloader on "https://rr3---sn-4g5lznek.googlevideo.com/videoplayback?expire=1734408141&ei=baNgZ5WAHdyDi9oPy4DLuQM&ip=2a02%3A908%3A186%3Ad8e1%3A7d3c%3A45d0%3A7ca6%3A4aaa&id=o-ANjbtrLyOSuZAts9U7kohTaiqANt4mBCkbojrV-_t3j7&itag=251&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&met=1734386541%2C&mh=_O&mm=31%2C26&mn=sn-4g5lznek%2Csn-5hnednsz&ms=au%2Conr&mv=m&mvi=3&pl=46&rms=au%2Cau&initcwndbps=2408750&bui=AfMhrI9PgPvSRYxWkPHOIigQ8rQBWzZsZ2rmsWCxGVxUhXtUxvfCbNggTAvq0GKtxUz2pCa4FdwIBLv2&spc=x-caUCvN89n9uqG7By22EofXAob8CVuPydGFKeDRFNrTqPRdgw&vprv=1&svpuc=1&xtags=acont%3Doriginal%3Alang%3Dde-DE&mime=audio%2Fwebm&rqh=1&gir=yes&clen=17399007&dur=1197.441&lmt=1731952038377256&mt=1734385993&fvip=1&keepalive=yes&fexp=51326932%2C51335594%2C51347747&c=IOS&txp=4532434&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cxpc%2Cbui%2Cspc%2Cvprv%2Csvpuc%2Cxtags%2Cmime%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRQIgMkSGlLj_MhGb__bd0gDvn_ayC-r70FCOSBIoXEFeH68CIQC-__Mvwf86cWqYbQpdV4J05LThp_cfaA86V5g5YaqsfQ%3D%3D&lsparams=met%2Cmh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Crms%2Cinitcwndbps&lsig=AGluJ3MwRgIhANfBW-y6_SjGWobpeEaXc7PBPoa_n6QW4zJBMEYXaIelAiEAoAJ5BaeNeNwlvZ9JHCvpCPUpCmdz6wCval_h3-_IbN4%3D"
[download] Destination: Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].f251-1.webm
[download] 100% of   16.59MiB in 00:00:02 at 6.35MiB/s
[Merger] Merging formats into "Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].mp4"
[debug] ffmpeg command line: ffmpeg -y -loglevel repeat+info -i 'file:Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].f401.mp4' -i 'file:Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].f251-1.webm' -c copy -map 0:v:0 -map 1:a:0 -movflags +faststart 'file:Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].temp.mp4'
Deleting original file Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].f251-1.webm (pass -k to keep)
Deleting original file Expedition zum Absturzort von Flug 571 - Schneegesellschaft - 72 Tage gefangen im Eis  ｜ Teil 1 [0j1jfNnvC6w].f401.mp4 (pass -k to keep)
```