I haven’t done more than just play a little bit with Vorple, but the docs say that transcripting is something that Vorple supports … with some caveats. Notably, the section “the extended directory” says
Vorple supports saving transcripts when the player initializes it by commanding TRANSCRIPT ON, but retrieving the transcripts must be handled separately.
So there’s no built-in way to retrieve saved transcripts if the author hasn’t added one to the game. But there are some suggestions here that might point you in the right direction, even if they’re targeted more at authors for works using Vorple.
EDIT. Whoops, fixed a link, and some link formatting