Donating works from over here as well ^^ And honestly, the game is worth every cent, possibly more. And you really deserve that for the effort you put into all of this.
As a non-native speaker, I can tell that I have seen "worse"- Your writing didn't bother me and I don't recall any hard to read parts. People might wanna switch from Google Translate to Deepl.com. That one uses neural language processing (fascinating topic tbh) and translations feel quite natural. Have you considered making the game multi-language by letting the community input translations? But that might be a lot of extra work. I just thought, if they already kinda did that for themselves, they might wanna share it with others this way. Yeah, I imagined my solution looking kinda like your thank you page indeed.
Here's another thought, I just had on this: Maybe, some people want to skip optional monologues. How do you feel about adding something like a "page x of y" (maybe more like "(x/y)") on the bottom?
I absolutely what you mean about that aspect of writing. This is sometimes just wild. It often times feels like the story already exists out there (Plato might have called that "World of Forms"—sorry for getting philosophical ^^) and it somewhat just flows through you, your arm, your hand, your fingers and your pen onto the piece of paper or the keyboard onto the screen. Another thing I do while plotting for a story, I wait for an idea to ripe. Sometimes, the way, I wanted that one subplot to play out, just doesn't feel right to one of my characters. In that case, I wait longer until the character comes up with a slight alteration that keeps the general idea intact while making it coherent for the character to decide or act a certain way toward a specific goal.