I'm not sure what you mean.
> as the historical, political and economical circumstances have been documented widely already.
I'm far from being a nationalist if it comes to German as lingua franca, and English is almost the second best choice for Germans. (Afrikaans would probably be even easier). But it was a real world language back then.
But I'm sure an alternate history where France and England loose the WWI (Russia did BTW) would have produced a very different outcome.
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery