The translation is not complete but the game is entirely playable since everything other than the interface(s) is translated well enough, every move, every item, every monster's name, every bit of dialogue, every location name, etc... and the untranslated options other than the main menu ones have symbols that make them easy to identify. [Note: this review is based on version 1.07 according to some comments newer versions of the game that have better more complete translations are out there, if by the time you see this review there's a newer version up this portion of my review may be obsolete].
Writing: A cute parody story set in a post apocalypse, about a boy pursuing his dream of being a poke~ *cough* Yarimon trainer, alongside his two childhood friends/rivals that have crushes on him, his tsundere bully, and his tomboy best friend. Resolving various minor conflicts along the way, and eventually saving the world, whilst uncovering his mysterious partner's past.
The gameplay is exactly what it should seem like to anyone that realizes what it's a parody of, if you ever feel frustrated with the difficulty don't hesistate to use the cheat move, there's no special reward for not using it, and the story just assumes you use it anyway, since story wise there's a reason your partner is that OP, it's not just so you can cheat.
Music wise it has a decent amount of variety given the size of the game and some of the soundtracks are honestly really good.
SMALL GUIDE FOR ANYONE STRUGGLING WITH INTERFACE:
In the main menu when you launch the game click on the 4th option if it doesn't say english in the box that option sets the language for everything other than the interface, if it already says english you don't need to do anything else, The 1st option is start, the 2nd option is load, and the 3rd option is settings (audio and something else)
IN GAME INTERFACE GUIDE:
-the blue notebook is your Yarimondex
-the pink notebook is your humandex (aka: h-scene gallery)(Note: one of the scenes can only be accessed in a secret extra area, that your told how to access after beating the game, and any scene you chose not to watch/unlock can be unlocked in that extra area too, there is no way to accidentally lock yourself out of completing this dex).
-the discs are your monster discs(aka: your party)
-bag is items
-green notebook is save files(There are 20 save slots you can use)
-the gear is the same settings option you access in the main menu
-the back arrow just closes the menu
-Lastly, once you unlock fast travel the witch's broom is your fast travel option(this interface isn't translated either but you can clearly see which locations are which, because it shows you an aerial view of each location you can fast travel to)
PARTY INTERFACE
Clicking on your yarimon will bring up three options
-1st allows you to set your yarimons moveset(they never forget any move but they can only use 4 at a time)
-2nd allows you to change the position of your yarimon
-3rd allows you to use stored exp to level up your yarimon
-Lastly bellow where your last party member is there's a button with a couple of squares, this button allows you to retrieve any stored Yarimon at any time.(It's honestly better to use this method to swap out Yarimons, not the machine in the clinic, since there's no risk of accidentally releasing your monsters this way, and you don't need to seek out a clinic)
Lastly for anyone that wants to actually cheat; Mtool works on this game(messing with items is probably the safest way).