is there a not super complex way to crack into this game's text (or for renpy games in general) so i can fix the english translation, even if only for my own experience?
Kind of? But you'll need to learn how to somewhat read code. .You could download something like notepad++.
In the game folder there is a file called scripts.rpa. To see the .rpa at the end make it so that when viewing the folder you have the file extension showing. Open up the file and then you'll need to search for the sentence.
Easiest way to search for it would be to take part of the original sentence and then hit ctrl+f to open up the search and then paste it in there. Hopefully it'll find what you're looking for.
But it seems that notepad++ may not translate everything correctly, so you may see some goobledy gook writing like wingdings. I may actually recommend not to really mess with this too much, as looking at everything, the files are pretty organized unlike other games I've fiddled with to get the text correct. But that file is where it looks like the main script is located at if you have issues with some of the wording.