Hi and welcome back
The truth is that Apollo doesn't like Hyperion and thus the V4 cores are not tested with OS3.1.4 much.
Apollo doesn't like AmiKit either
The last supported core is R3: https://www.amikit.amiga.sk/v4coresupport
For some reason, they don't like Directory Opus Magellan II either so the V4 core might struggle with it.
All in all, the V4 is simply not 100% Amiga compatible yet and that is the reason why you're experiencing random crashes. I am really looking forward to a final and 100% Amiga compatible core - if that is going to be ever released. Meanwhile, it's just a beta product, unfortunately and that's why I was forced to drop AmiKit support on V4 - see my Facebook post for more details: https://www.facebook.com/AmiKit/posts/10158762283999280
Anyway, regarding microgolded, I think the English is hardcoded? You can download German version, though: https://www.softwareandcircuits.com/division/amiga/products/microgolded/microgolded-os4-ged.html