YouTube Auto-Translate Captions: How It Works and How to Do Better

How viewers turn on auto-translate

On a computer:

1. Start the video and turn on captions with the CC button.
2. Click the settings gear.
3. Choose Subtitles/CC, then Auto-translate.
4. Pick a language from the list.

On the mobile app, the steps are similar: tap the video, open settings, choose Captions, and select the auto-translate option where it's offered. The translated captions appear in place of the originals.

Why auto-translate is sometimes missing

Auto-translate needs captions to translate. It won't appear if:

• The video has no captions at all, uploaded or automatic.
• Automatic captions aren't available for the video's language or audio quality.
• The creator has limited caption features, or the video type doesn't support them.

If you're a creator and viewers report it missing, check that your video has a caption track in YouTube Studio under Subtitles. Automatic captions can take some time to appear after upload, especially for long videos, so a brand-new video may not offer auto-translate straight away. Uploading your own caption file removes the wait.

Why quality depends on the source captions

Auto-translate is a machine translation of whatever captions exist. If those are YouTube's automatic captions, any recognition errors are translated too: a misheard product name becomes a wrong word in every language. Automatic captions also often lack punctuation, which makes translation harder, because sentence boundaries guide meaning. Garbage in, garbage out, in 100 languages at once.

Captions you've checked yourself give auto-translate a much better start. And captions you've translated yourself bypass auto-translate entirely for those languages.

Uploading your own translated caption tracks

In YouTube Studio:

1. Open Content, select the video and go to Subtitles.
2. Click Add language and choose the language.
3. Under subtitles, upload a file: choose with timing, then upload your SRT or VTT.
4. Publish.

Viewers who choose that language now see your track, not a machine translation of your original captions. Upload a checked track in the video's own language as well: it improves the experience for viewers watching on mute, and because auto-translate works from it for every language you haven't uploaded, it quietly improves those translations too. If you edit a video after uploading captions, YouTube doesn't shift the timings for you, so re-run and re-upload the tracks for edited videos. Uploading subtitles to YouTube covers the steps in more detail, and YouTube captions and SEO explains why uploaded captions can help discoverability.

Making translated caption tracks with mydubly

Upload your video file to the subtitle generator. The video stays on your device and only the audio is sent. Choose the target language, among 21, and download a translated SRT and VTT ready to upload to YouTube. Run the video once per language. Each run costs 1 credit per minute, so Spanish, Portuguese and Hindi captions for a 12-minute video cost 36 credits in total. Have a fluent viewer or community member check important videos; community subtitles covers working with volunteers.

Beyond captions: translated titles and audio

Captions are one layer. Viewers also see your title and description, which YouTube lets you translate in Studio, and translating YouTube titles and descriptions covers that. For viewers who'd rather listen than read, YouTube's multi-language audio lets one video carry dubbed tracks; multi-language audio on YouTube covers that separately.

Which languages to add first

YouTube Studio's analytics show where viewers watch from and which subtitle languages they use. Start there: the languages with the most viewers watching through auto-translate are the ones where your own track will improve the most viewing. Common first choices for English channels are Spanish, Portuguese and Hindi, but your numbers may say otherwise. Add a language, watch whether watch time from that audience changes over a few months, then decide on the next. Back catalogues can be done gradually, starting with your most-viewed videos; translating a YouTube back catalog covers prioritising. The YouTube video translator page covers subtitle and dub workflows for channels.

Limits to know

• mydubly makes caption files from your video file, not from a YouTube link, so start from your original export.
• Subtitle cues are one line each, without a length limit; you can split long cues in an editor if your style requires it.
• Machine-translated captions should be reviewed before you rely on them for important content.
• Uploaded tracks don't update automatically if you change the video; re-run after edits that shift timings.