In this article
Fastest fix order
- If the player has no CC button, there is no source-caption track for auto-translation to use.
- If CC exists but Korean is missing, open Settings, Subtitles, Auto-translate, then Korean.
- If Korean translation is wrong, inspect the original-language automatic captions before blaming the translation step.
- Live streams have more restrictions than uploaded videos, and a new VOD caption track may appear after the stream ends.
Separate the problem into three symptoms
YouTube auto-translate is not an independent system that directly turns speech into Korean. It translates a source-caption track supplied by the creator or generated by YouTube, so the presence of CC is the first diagnostic checkpoint.
| Symptom | Likely cause | First action |
|---|---|---|
| No CC button | No creator or automatic captions | Compare another video and review caption-generation conditions |
| CC exists but Korean is missing | No direct Korean track; Auto-translate is required | Choose Auto-translate in the caption menu |
| Korean appears but is inaccurate | The source automatic caption is already wrong | Inspect original-language caption accuracy |
1. The video has no source captions
Auto-translation needs a caption track uploaded or edited by the creator, or an automatic caption generated by YouTube speech recognition. If there is no CC icon at the bottom right of the player, no caption track is currently available.
- Check whether CC appears on another video from the same channel.
- Compare the same video's CC status on desktop and mobile.
- If the video was just uploaded, wait for automatic-caption processing.
- Check the description and pinned comment for a creator transcript or external caption link.
On a TV or game console, the caption icon may appear but remain disabled when the video has no captions. This still points to the video's caption track rather than the device itself.
2. Check processing and video language
YouTube does not complete every automatic caption at upload time. Its official help says processing time varies with audio complexity, while unsupported languages and very long videos can also prevent automatic captions.
- Conditions that can slow processing: long videos, background music, multiple speakers, low volume, or mixed languages
- Creator check: caption-processing status and original video language in YouTube Studio
- Viewer check: select the source-caption track matching the audio before Auto-translate
- Important release: prepare a reviewed caption file rather than waiting only for automation
3. Check audio quality, silence, and overlapping speech
YouTube lists accents, dialects, background noise, pronunciation errors, simultaneous speakers, and a long silent opening as causes of missing or inaccurate automatic captions. A fluent-looking Korean mistranslation may begin with a source caption that captured the opposite meaning.
| Condition | Typical problem | How to check |
|---|---|---|
| Loud background music | Dropped speech or unrelated words | Compare original audio and source captions |
| Overlapping speakers | Merged sentences and speaker-switch errors | Slow playback and inspect each speech segment |
| Mixed languages | Proper-name and language-switch errors | Confirm the caption language matches the audio |
| Long opening silence | Automatic captions may not be generated | Creators can edit silence or upload captions |
To locate the error, turn off Korean auto-translation and show the original-language automatic captions. If numbers, negation, and product or company names are already wrong, changing the translation language will not fix them.
4. Live streams have separate restrictions
According to YouTube's official documentation, automatic live captions are English-only and gradually available to English-language channels. They require normal-latency streams and are unavailable for low- or ultra-low-latency streams.
- Automatic live-caption language: English
- Required stream setting: normal latency
- Failure factors: unsupported language, low audio quality, overlapping speakers, or mixed languages
- After the stream: live captions are not retained as-is, and a new VOD caption track may be generated
If CC was missing during the live session, check again after the broadcast. Once VOD processing creates a caption track, the Auto-translate option may become available.
5. Turn on Korean auto-translation in the right order
Menu labels vary slightly by device and app version, but the core flow is always to confirm source captions first and then choose Korean from Auto-translate.
- Desktop: enable CC, then choose Settings, Subtitles/CC, Auto-translate, and Korean.
- Android: open the player menu and Captions; if Korean is not listed, choose Auto-translate and Korean.
- TV or console: pause the video and inspect the available languages under Captions.
- If other videos work but one video does not, investigate that video's captions before the account or browser.
Alternatives when captions are missing or tiring to read
| Situation | Alternative | Best use |
|---|---|---|
| CC exists but you need the full context quickly | View YouTube transcript | Search and locate key sections |
| The video has no caption track | Operating-system accessibility captions | Separate on-device speech recognition |
| Reading the screen is tiring | System-audio speech interpretation | Listen to foreign video in Korean on a Mac |
| The information affects an important decision | Source, official document, and human review | Prices, contracts, medical and legal information |
kkamagi sends capturable Mac system audio to the OpenAI or Google API chosen by the user and outputs translated captions and interpreted speech. It does not depend on YouTube CC, but it requires system-audio permission, an API key, and provider billing, and real-time delay or mistranslation remains possible.
- API keys are stored in macOS Keychain.
- kkamagi does not save original or translated audio files.
- Captured system audio may be sent to the selected external AI provider.
- Protected content or apps that restrict capture may not work.
Frequently asked questions
Why is Korean missing even though the CC button exists?
If there is no manually supplied Korean track, choose Korean inside Auto-translate. Auto-translation still requires a source-caption track.
When will automatic captions appear on my upload?
There is no guaranteed time. YouTube states that processing time varies with audio complexity.
Does a live stream support Korean auto-translation?
The underlying automatic live captions have separate conditions including English and normal latency. Without a source live-caption track, Korean auto-translation has nothing to translate.
Which is more accurate: translated captions or AI speech interpretation?
There is no universal answer. Captions make source comparison easier, while speech interpretation reduces screen reading. Verify important facts against the original and official documents.
Official sources
Check source captions before auto-translation
Check CC availability, source-caption accuracy, processing status, audio quality, and live-stream conditions in that order. When captions are unavailable or tiring to read, choose a transcript, accessibility captions, or system-audio interpretation based on the situation.
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