StreamTranslateSpoken language describes the input
Set My spoken language to the language you will speak. That tells speech recognition and translation what audio to expect. It does not automatically decide which translation appears on YouTube.
Choose the text your viewers receive
In Control’s YouTube captions box, select Same as spoken to send the original words. To send a translation, choose a different subtitle language. For example: spoken English + chosen Spanish sends Spanish captions.
Your browser-source overlay can keep its own language choice. YouTube’s caption selection controls the one native CC output.
Match that choice in Studio
Choose the same caption language in the broadcast’s YouTube Studio settings. Studio’s language selector is not a replacement for StreamTranslate’s translation choice. A mismatch is an invalid setup even if some text appears: the track label and delivered text can disagree.
Example: for English speech translated to Japanese, set spoken English in Control, choose Japanese for YouTube captions, and choose Japanese in Studio.
Change languages between streams
Go offline on YouTube before changing the caption language. Disable YouTube captions in Control, choose the new language, match it in Studio, check the ingestion destination, then enable captions and test the next broadcast.
Example: change the audience language
Suppose the first broadcast uses English speech with Spanish subtitles and the next uses English speech with Japanese subtitles. Keep the spoken language English. Between broadcasts, change the YouTube subtitle choice to Japanese in Control and match Japanese in Studio. Check that the caption destination still belongs to the next broadcast. Merely changing Studio while leaving Spanish selected in Control does not configure a Japanese translation. Use a short phrase you understand to verify the source, then inspect the translated output.
Sources and setup limits
See YouTube’s official requirements for the underlying caption transport and latency modes. Actual behavior must also be checked on your own broadcast.
Common questions
Can Studio translate the captions StreamTranslate sends?
Use StreamTranslate’s subtitle language choice to produce the intended text and match it in Studio. Do not rely on a mismatched Studio setting to translate it.
Can source and translation both appear as separate native CC choices?
The HTTP caption integration supplies one chosen feed. Use the overlay when you want a source-and-translation layout in the video.