Hello.
1) There will be no HTML engine, as of the last time I tested this, the best results were achievable on Chrome, which was ~125 times too slow to run the game smoothly, whereas other browsers were about ~250 times too slow. This game just doesn't belong in browser and there is no way it could ever run in one efficiently. And quite frankly, I'm not sure if it could run in one at all considering some of the things happening behind the scenes.
2) All of the texts is available in txt format within the data.zip file, but it's unlikely that's actually what you need/want. I'd suggest trying to use the right click menu to capture filtered text from the engine output. This game is untranslatable otherwise.
I think I have an idea what's up. You're likely using the last stable version 149 or even the version that got pirated for whatever reason, which was I think 049. The most current in-development version (which includes text copying, or at least should) is 236.4, which is available only on my Discord (as all in-development versions are).
Does this work for you: https://mega.nz/file/y2ZUjSzC#gzcgmdI1yWhSt4zLXjiKeMTMHty871JQi5oNi1-hPEk
You're not the first person to want some way of translating the text. I'd be interested to know if this functionality helps at all. (The right click menu.) I never managed to get much feedback on it when I implemented it.
I see, I see. What you're saying does make sense. Yeah, copy new text also copies in the new menu text. I will make it so this doesn't happen anymore, but unfortunately please don't expect this to happen soon, there's a whole lot of stuff we need to get done and there's only so much time in a day. I'll also see about the filtering in case I can improve it. (You can remove the text from the very bottom, the one that starts with "API tokens" by turning off Developer Mode in the menu.