Over in the Southern UK a certain Doug Hudson claims and performs a version in mock-German. The trick of the chorus is that he alleges he only had a little German dictionary and he knew that Rover was a dog's name and the only German dog he could find was a dachshund: Thus

Nein, nicht, niemals: Nein nicht niemals kein mehr; Will Ich spiele Das wild Dachshund: Nicht niemals kein mehr.

Also there is the version to the Banana boat song tune

Ive been a wild Rover for many a year/ Daylight come and me wanna go home/ I spent all me money on whisky and beer/ Daylight come etc

There's another niggling at the edge of my memory. Original words and a wholly inappropriate tune - a bit reminiscent of one of the tunes to "The trees they do grow high" (but not that one). I'll keep mulling it over.