Ok, I was browsing Amazon.de in order to see if I could find any interesting titles. I know that one can sometimes find titles released in Germany that are not available elsewhere, or better releases.
So I found Frankensteins Monster im Kampf gegen Ghidorah on BD. But wait a minute! It's been quite a while since I saw Ghidora, but I'm pretty sure that there was no Frankenstein's Monster in the movie I saw. As far as I know the only two kaijus featuring Frankensteins monster are Frankenstein Conquers the World and The War of the Gargantuas. And the reference to Frankenstein doesn't even exist in the US version of the latter.
But in Ghidorah??? Did Germany get a different cut of the movie than the rest of the world, or did the German title translator just go nuts? My money is on the latter, but it would be interesting to hear what our German friends have to say about it.
Not that Swedish translators have been much better. I don't think Ghidorah was ever shown theatrically here, but War of the Gargantuas was titled "King-Kongarnas krig" (Literally "War of the King-Kongs"). Yes the Gargantuas looked a bit weird, but they sure as hell weren't gorillas.