Spanish Sub is not ready but I have made a few changes after watching some playthroughs of the game.
1) The black text-box graphic is went from 50% opacity to 75% opacity, this should make it easier to read.
2) Playing the game in Japanese will depict the Japanese title on top, and the English on the bottom.
3) There has been some amount of confusion about one of the characters, so I added 2 messages to the story to make it more likely that players will understand it on their own.
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In other news, I've been playing around with motion capture recently. I am thinking I might try to use it to create some non-playable cut-scenes in the next episode.
P.S. In case you didn't know, I provided Mayfly's voice myself. This works out because in Ep 1-2, she has no lines of dialog and just says TLOZ like grunts. It may or may not surprise you, but I am actually thinking about giving her lines of dialog in later episodes. Now, personally, I thought it'd be funny and efficient if I was the one who did her dialog in both English and Japanese. Obviously the pro would be that Mayfly would definitely sound 100% consistent across both languages. While the con would be, I might not be able to sound close enough to a Native speaker; I am Japanese in race-only.
I'm only pointing this out because- When possible, I prefer to do as much of the work myself, since the fewer people I have to work with, the closer it can be to my vision, and the less back-and-forth communication I need to participate in for directing.