I don't think the main download is localized - it's the original japanese version, and you're supposed to install it and then install the English patch to localize it. The specific garbage in your screenshot looks like an encoding issue; I'm not familiar with Locale Emulator and not sure why it would cause that.
There again, I'm afraid I too am failing to install this game, for issues that I think are unrelated (I'm trying to run it in Wine, and the installer ends up asking for the nonexistent third data file).
I was thinking that the download was already patched for English. My bad.
I seems that I was mistaken: I don't have Locale Emulator installed, but have the Windows Region/Language set to Japan/Japanese. In spite of that, the installer is displaying the same garbage whether set to US/English or Japan/Japanese. Maybe I did not configure it correctly? but I don't see how that could be.
Anyway, I have now installed Locale Emulator and ran YNS setup, selecting "Run in Japanese" in the LE context menu. Now it looks like the YNS installer is displayed in Japanese, but it still won't install anything. I can't read Japanese, so I may be clicking on the wrong buttons. As I mentioned in my previous post, I found the install location destination selection, but after that I don't know what is what.
I was hoping that I could test the installation with this download, then if I got it working and patched I could feel confident about purchasing the game from dlsite and patching it.
I am still hoping that someone who has successfully installed the game from this download can help me. Please?
EDIT:
I found a website with instructions including (screenshots) for installing this. I will see if that helps.
EDIT2:
I reconfigured the Windows 11 language/region, and now it works. I installed the patch, and the game is playing now, in English.