You gotta translate it to english and then translate the english to Spanish, not just directly japanese to Spanish(I knew about this and chose not to fix lol)
Once it has said you win, it will ask if you want to retry to see what the key was for and when you do retry, one of the options may not do the same thing.(NO progress saves at ALL so you might want to save the input that got you to the 'win' screen lol)