Or why Tatsuo Nishiyama (if it's really him) goes by the name I.Marui. There are several reasons why developers used pseudonyms back in the NES and SNES era, I think Nintendo or at least EAD began using their real names when they began work on Super Famicom. Altering the staff roll is outside the scope of my project but as some continue to ask for it I guess I can do a separate patch. It's easily done.
What I think may have happened is that "I.Marui" was actually meant to be written "MaruII", as in "Maru(x)II" (MaruMaru, get it?) but the programmer that entered his pseudonym screwed it up. Which likely happened because of a combination of bad handwriting and the fact that Japanese normally list their surname first, followed by their birth name and this game does the opposite. This would explain why there no one can find information about a "I.Marui" working for Nintendo, why even the Japanese wiki page has it only written in English and why it appears that more than one person is using the same pseudonym.
Getting back to your suggestions, I really like what you did. Your line for the sword guy is quite clever. The two lines of text I wanted to change even before upload was that one, and the one for the old guy hinting at its location. The latter is very wordy in the English version and its placement in the dungeon usually means you will see the hint twice in a very short amount of time (perhaps another way of the developers to say, you better upgrade your sword). Instead of "Did you get the sword from the old man on top of the waterfall?" would "Did you get the sword from the old man above the waterfall?" work or the less specific "Did you get the sword from the old man at the waterfall?" Actually, I think it's the only one from the original that I left alone.
Thank you. Look a bit of work to come up with something that wasn't too wordy. Tho I'm not entirely sure how well even that one will fit into the script.
BTW I threw in a little Indiana Jones and the Last Crusade for the old man with the red potion or heart container choice, if you did not notice. https://www.youtube.com/watch?v=oF2UrYSDb3k
As for the line about the old man above the waterfall, I couldn't come up with anything better either.