Only tinkering with the user data values I'm afraid yeah. I'm certainly no game dev or experienced modder. I just love to mess with anything that exposed and not hidden away in special file formats. : P
Regarding the user data though, have you noticed that you can make a copy of the "sample" folder provided, and the game will recognise it and add it to the list of options when starting a new save? I refered to it as modding because it seems pretty clear to me that the dev wanted people to play with the game and create their own variations on it. The data txts are full of blanks spaces titled "user data" and such, to allow custom variations on things to be added. So far I've messed around with the stats a bit, testing silly things like making the sword girls lesbian attack be active from the start, and cause instant orgasms (just for lulz).
Also, the dialogue, in battle messages, map text, and cutscene text is also all fully open to editing and is able to support English text. So the only obstacle to translating the game would be finding someone who is able to do the translation itself. After that, absolutely anyone could edit it into the game. I've already tested translating the attack types and some other things, just based on the file names which are written in English, such as "Shot" "Burst Shot" "Tentacle Caress" etc.
Overall the ability to mess with the game without properly understanding it is still pretty limited, but it's fun to try.
