Hard to translate, and it is almost impossible to get the meaning unless you know german language, but it has been 'composed' by an Englishman indeed.
In German it is:
"
Mein Hut, der hat drei Ecken
Drei Ecken hat mein Hut.
Und hat er nicht drei Ecken,
dann ist es nicht mein Hut."
When you speak this aloud in german, it sounds a bit like that:
"
Mine hoot air hat dry egg hen,
Dry egg hen hat mine hoot.
Hunt ate air knit dry egg hen,
Dan Vera's knit mine hoot."
But it certainly makes no sense, it is just pronounced with english words,
what it really means is:
"My hat it has three angles,
three angles has my hat.
And had it not three angles,
it would not be my hat."
This is from the 'The complete works of Lord Charles' by Mr. Hulmes , "proving" that all german folk Songs are indeed english ..