A thing I have always wondered why did the Slovenians keep their own languages, they was integrated into Germany rather early, and the Slavic areas in the rest of Ostmark was germanised rather fast. But Slovenia just stayed linguistic distinct.
What historical consequences would a German Slovenia have? Not to insult Slovenians, but their people seem to have little effect on world culture in their own right and for most of their history seemed more like Slavic Germans than an independent nation. So beside unforseen butterflies would we see more or less our history until the 19th century?