The Speech Analysis tool in Adobe Premiere Pro and Prelude allows you to examine the audio of a video file for an automatic transcription. However, the tool only transcribes the audio of the language that was originally installed.
Additional language packs are available for download. They allow Adobe Premiere Pro and Prelude to transcribe a greater variety of languages. You can see the available languages in the Speech section of Analyze Content dialog box. Uninstalled packs are listed, but are dimmed and can't be selected.
Previous versions of Adobe Premiere Pro and Prelude had these language packs available for download on www.adobe.com. However, Adobe Premiere Pro CC and Prelude CC use a different workflow, so it's easier to install speech libraries.