After uploading an episode, click on its title in the episode list to see the episode settings.
You'll see the "Generate Transcript" button under the media player. Click that and wait several minutes. The exact time depends on the length of the episode. A rough estimate is a quart to a half of the length of the file itself.
The button changes to "Transcript in process" while processing.
When transcription finishes, you'll see "Download Transcript" which downloads a .txt version of the transcription.
You can copy/paste that text into another document, or the episode description if you'd like.
The transcription should auto-detect the language being spoken.