Ignoring all of the implausibility of this, the problem I have is that there is no hint of any German influence on this culture. Nobody has a German name, none of the spaceships have German names, etc. Yet it's consistently called the "Anglo-Saxon" empire and there is no hint that Britain has somehow swallowed up Germany in the
Basically I feel I have three options:
- Explain it as the story being a translation of the Empire's Anglo-Saxon language, a mixture of English and German. It's just a coincidence that most of the story revolves around English characters.
- Explain it as the Empire having decided (by vote or whatever) to use English as its only language.
- Say that Germany has its own fleets etc., German is the second language of the Empire, they're also involved in the war but we don't see them because the viewpoint characters serve with the British fleet.