The sequel's listed to be getting a translation this year, but it's got a crazy amount of dialogue compared to the first, so I wouldn't be surprised if it took even longer and got delayed...
I actually translated a bit of my own copy of Demon Gunplay 2 to see what it'd be like, but besides item descriptions, some menus and a bit of the intro (and some later scenes), I got overwhelmed by the sheer amount of lines, and more frustratingly, how many of them are repeated.
I might be tempted to try to translate Demon Magic (the third game) though...since there's nothing suggesting it's getting a translation at all, and it's much shorter.