Toraware no Shoujo -Bluebird of Happiness-

author=Dragnfly
No prob. I can feel your developer spirit and it is strong.

There's 3 methods for a person to check a game's translation.
1) They make notes while playing. This is the worst way because it eats up far too much time for anyone to want to do it for free. They'll also miss a lot. I once worked 144 hours doing this for somebody and then their game didn't even come out. And, frankly, it's easy to grow to dislike the game when it's done.
2) They're given an uncompiled copy of the game. First off, this is dangerous. It should only ever be done with somebody you trust like they're your brother. Needless to say, they can easily steal or prank your game. It's a very thorough method though since they can literally see all text. They can lose context though. And, English being the terrible monster language that it is, context is important.
3) Getting a google doc or something of the text. It doesn't even need to be the design document but every game should have one of these anyway. This is the fastest because add-ons like Grammarly will catch a lot of the problems beforehand. You may end up not even needing a native speaker. They have 0% chance of getting stuck somewhere in the game and you can just copy/paste the changes into RM.

author=Dragnfly
Oh, and one thing I forgot to mention. In one of the flashbacks, there is a photo of Jugo and Ai in the living room, despite it being a flashback.