We've more or less left it vague on purpose where RL languages have their roots. Austral, or our RL English, which also is a Germanic language, is widely spoken, and many nations have it as a native language. I think it would be hard to agree on a place for its origin, like for other RL stuff (religion, ideologies etc).

The use of German is not as extensive, although there have been a few nations with it over the years. I'm not sure if there currently is another nation with generic German, but I think we should be careful with claiming origins of RL languages, which could make it difficult for new players who also would like to use those languages to get involved. A common language would implicate a shared history.

Maybe we could come up with a fair system of establishing origins for RL stuff?