OP has a point, Wayfinder was designed to be a German language server.
Where OP has it wrong is that Wayfinder did not attract a large enough population and was converted to just another server. In fact, it became the default recommended server for new players.
The result is that Wayfinder is no longer a German language server. (And, to be honest, it was never in Germany anyway, being run out of the US right along with all the other servers.)
So, Wayfinder is just another English language server where non-English speakers can and will be found.
OP is making more out of this than they need to and the result is a thread that is increasingly jingoistic. Personally, I'm of the opinion that Turbine is an American company operated out of the United States. English is the lingua franca of the game just as it is the lingua franca of the business world.
People might prefer that this were different but it is not. Thus, the only language that should be expected from all group members is English -- not because I am American but because it is a game developed and operated out of the US. Were it made and run from Germany I'd expect the lingua franca to be German. Same for China, Russia, where ever -- if developed and hosted there then that language should reasonably be expected as the only standard.
But, OP's point about Wayfinder as a German server is incorrect. Thus the entire argument is false since it is based on the assertion that Wayfinder is intended for Germans only.