This actually is machine translated, says so in the OP even. Based on the exact message, I'd say an MTL base was used and then had very little actual correction done either due to lack of effort or lack of knowledge. Given that the translator seems to actually care enough to respond when a problem comes up, I would say they at least tried, but did not have the required knowledge to translate from machine English, which can sometimes be too nonsensical to translate even for a native speaker of the intended language.
It isn't really that bad, but the grammatical structure and wording can be a bit nonsensical at times, which does not convey the proper message of the line in question. That said, I have seen worse. Don't even get me started on real time translations, which tend to be so bad that even those of us who try to make sense of it to make a human translation, looking at you Koikatsu H subs, have difficulty at times.
But the genre itself isn't even segregated as a whole, it literally means ANY girl who looks underage or extremely young, but legal even if they actually aren't 'biologically' underage or extremely young, but legal. That's where the term "legal loli" came from as a way for the entire community to separate the two subcategories of loli. In this case, that would probably be legal loli due to the whole demoness thing as they tend to be far older than any human.
Okay, now for the whole reason I even bothered responding to the above in the first place, my own comment. I finally got through the Black Cave without having to use the escape scroll to bug myself out of the playable area of the world map and now I am stuck in the mayor's hoouse in Anal. I can't seem to get by the guy in the right hallway off the main entrance, he just turns to quick to get out of his line of sight and his pathing is too short to sneak by while he's going to the left. There are spots part way down that hallway where he can't see, but I am in his line of sight as soon as he turns back if I step out of them. How do I get down that hallway without getting my brains pounded out of my skull for the umpteenth time?