for this video 'Z1ryOwW0AdU', only - en ("English") available in the ' TRANSLATION LANGUAGES', for 'JQT9sT1YuAI' transcripts are available in the following languages: (TRANSLATION LANGUAGES) - ar ("Arabic") - zh-Hant ("Chinese (Traditional)") - nl ("Dutch") - fr ("French") - de ("German") - hi ("Hindi") - id ("Indonesian") - it ("Italian") - ja ("Japanese") - ko ("Korean") - pt ("Portuguese") - ru ("Russian") - es ("Spanish") - th ("Thai") - uk ("Ukrainian") - vi ("Vietnamese") 'zh-Hans – Chinese (Simplified)' should be here and others language available . Did I forget something, or something go wrong? There should much more language available in ' TRANSLATION LANGUAGES' youtube-transcript-api version: 1.1.0