I think it's a pretty silly assumption that the game is only riddled with bugs because you're playing a demo, a demo is the games chance to show off what it has and convince you to spend money on it. A buggy mess where the rnpcs don't look like the game says they're supposed to, with frequent crashes and errors does not inspire confidence in me to pay for the full project, especially when it is very poorly translated to English in a way that's pretty close to broken, I don't do much in the way of coding myself, but just for example you have tags for male and female, making sure dialog checks the tags correctly should not be hard.