For JB Harold, are you talking about the voices, the text, or both? I was able to muddle around until I figured out how to change the voices, but I wasn't able to get the copious amounts of Japanese text into English.
People never seem to clarify this point.
Also, the preferred version of Exile WP/Janen no Jishou is just to not play it. The game is utter trash. The JPN version is better, but in the sense that a kick to the face is preferable to a kick to the nuts.
I also don't know if any English is necessary in Dungeon Explorer 1. Unlike 2, I don't seem to recall needing to talk to any NPCs to progress, but I didn't beat the game either.