Oh dear...
This game has a decent concept with the language parameter and the vigor parameter. Both are very neat additions that stand out in the game as stated by the previous comments. I enjoyed some of the music with this game (the battle theme against the 4 assassins is pretty awesome). Sadly, that is where the positives end.
Mapping is very lackluster in terms of both the over-world and the dungeons. The dungeons have a high encounter rate which is made increasingly aggravating when I do not have the option to run from battles. This game has a slight difficulty curve when you enter the first dungeon due to the enemies being able to thrash you rather easily (especially the wandering souls). Thankfully, with a bit of luck, I managed to be able to grind a bit (due to the frequent inescapable encounters) and make to the end of said dungeon. At that point, the game became a breeze since most encounters were pretty basic and I had the better stats (with 2 new party members to aid me). Then, the 4 assassins nearly ended me. I feel as though that they all have a bit too much health since the fight drags on for seemingly a long time and that they have a healer that could potentially prolong the fight even more (I managed to kill the healer off quickly, thank goodness). Outside of the battles and mapping, the dialogue is odd. There is odd indents in the text and the name of the character could be displayed through the means of the Message Core plug-in from Yanfly (though if that is your style then so be it, just a minor gripe I must mention). Do not forget item descriptions! Some are there, but many are missing. A revival item would be great to have at the shop since I have no other way to revive a fallen ally.
I do not mind the story too much, but when the mage was suddenly slaughtered after JUST joining the party, I could not bring myself to care. She barely had time to make a decent impression on me (this is definitely subjective, however).
Overall, the concept and effort is there but the battles need tweaking and mapping needs work. There is little to no polish in this game.
I wish you the best of luck for this game. You have something good to build on, no doubt. Keep at it!