Yes - Too much effort. You're linking me to longer and longer videos while giving vague explanations that doesn't help explain your point.
I don't know this game and you saying to look after the final battle doesn't actually help me pinpoint where I should be looking.
I didn't watch the video since it was 14min long and because I didn't know at what timestamp it happens, but is it not a similar issue where automatic translation will fail because it doesn't have the needed context of the game world?
Checking the sources X11 appears to be supported so seems likely that xlibre is just ever so slightly different causing it to not work for you. Doesn't seem like intentional non-support.
Looking at the text behind it it's indeed misinterpreting things but I would guess it comes from the hiragana usage. If you know the context it's easy to understand the correct/intended meaning, but assuming the AI is treating each new text one by one it likely has no context at all.
The latter...
I would not get the 85" simply because of its unwieldy size. Can you imagine what a pain it must be to move it? Not to mention how far away you'd have to sit up comfortably look at content.