And as of today, YouTube has added another six languages, including German, Italian, French, Portuguese, Russian, and Dutch. The feature was previously offered to English, Japanese, Korean, and Spanish captions. You don’t need to determine the original language of the video. Then you’ll have to click the button again to toggle on the translated captions. To activate a translation, users need to click the “CC” button along the bottom of the YouTube video player and select the default desired language.

(You can also query the active captions track with the getOption method, but it will return nothing if the auto-generated captions are used.The new feature will work on any video that already has closed caption translations of spoken dialog. I tried only the 'en' languageCode, of course this will change to the normal english captions track if there is one available, but will display the auto-generated english captions in the absence of a predefined track. However, changing the captions track works too and it turns ON the captions as a side-effect. (See: ) According to the docs only the 'fontSize' and the 'reload' parameters are supported. You have to wait for an onApiChange event before using the setOption function. Var firstScriptTag = document.getElementsByTagName('script') į(tag, firstScriptTag) Var tag = document.createElement('script') However there is a solution with the setOption method which works now, but there is no guarantee it will work in the future as this is a non documented call of the method: There is no official or documented way to force auto-generated captions in embedded videos.

Youtube automatic translation subtitles