He's actually illustrating the point that he doesn't understand how spelling works and how places names change with the language being used.
The modern habit of spelling a word in just one "correct" way is a fairly recent innovation - traditionally, you just slapped down some letters that sounded more or less right. The various surviving examples of Shakespear's signature don't all spell his name the same way ...
This shows up in the way different languages spell the name of the same place in fairly different ways. I live in Nijmegen, but if I cross the border into Germany, the signposts all point back to Nimwegen. A fornight ago I was driving past Cologne, but the signposts all point towards Koeln (actually, Koln with an omlaut on top of the "o", but the additional "e" is the standard way of representing the spelling if your font doesn't include the omlaut).
If I were to drive down to Burgundy (Bourgogne), from here the road goes around Luik (Liege) just after I enter Belgium (Belgie, Belgien, Belgique) ...
--------- Bill Sloman, Nimwegen