Hey Anthk, if you ported it to a Zmachine, does it mean is it like an interactive fiction game (aventura conversacional in spanish). Is it in the CAAD archive?
The game is not at CAAD because they woudn't accept as it a text adventure game.
https://www.ifarchive.org/if-archive/games/zcode/ztrek.z5 English version.
For instance: frotz ztrek.z5
Or Winfrotz under Windows, or Lectrote for any OS.
By pressing '9' you get the online help, in any language. Have fun.