Awesome to see someone tinkering with the Trine software. I didn't have any real issues running it in the browser, and for the genre, it was an interesting entry.
That said, I think this type of "educational" text adventure doesn't isn't really for me. I think the narration style reminded me a lot of the history textbooks growing up. This may well be exactly what you intended, which I would be interested to know more about.
There were a lot of archived images in this one (I was wondering if you've linked all your sources, and it doesn't look like it in the disclaimers, though you have mentioned that it wasn't drawn by you). 
- As a rather visual person, my eyes were always drawn to the choices, more than the descriptions.
In terms of improvement/expansion, something interesting to try and do could be to allow the player to choose whether or not they want to read the Spanish/English version, from the very beginning.
All that said, props for creating such a wonderful entry that had decent branching and translated the events depicted in the game quite well!