One reason I bought this game was because it was described as historical and educational. Being from Slovenia, in games like this I always check how Slovene lands are represented, and I did the same here on starting the tutorial. I was quite disappointed to find most of the Inner Austria was not part of the HRE at all, but marked as Ottoman Empire, Ottoman Theatre. Which put me off playing any further. I should also mention that names of the provinces (or whatever they're called here) are a haphazard mixture of German and Slovene names (IMO, to keep with the period, only German should be used), and Slovenija is written over the region on the map, even while being a 1848 concept.
Needless to say, Slovene lands were part of HRE since Charlemagne, and Inner Austria of the period was part of Hapsburg hereditary lands.