It's spelled Liechtenstein, not Lichtenstein. - Principality of Liechtenstein
Finnish Coat of Arms, not "Finish". - Coat of Arms of Finland
The Austro-Hungarian one is just the Austrian Empire's flag. Otherwise it would include green. - Austrian Empire
Bavaria variant 2 is probably the city of Krakow; not a secondary version. - Free City of Cracow
Saxe-Coburg has 2 green/white bars, and this one only includes one white bar. I believe it belongs to the city of Rotterdam. The green colour fits better, too. - City of Rotterdam
The Holy Roman Empire one is the flag of Silesia (part of Prussia at the time). - Silesia
The red horse of Hannover (?) should probably be renamed to the white horse, then, no? Anyway, it is just the flag of Hannover. - Electorate of Hannover
The Prince's Flag, btw, not the Princes Flag. - The Prince's Flag
The Royal Shield of Portugal is just the Portuguese flag at the time. Blue was introduced with Queen Maria II. - Kingdom of Portugal
Principality of Transilvania could be renamed to the "Grand Principality of Transylvania". - Grand Principality of Transylvania
The Electorate of Alsace-Baden is just the Electorate of Baden. - Electorate of Baden
It is called the "Confederation of the Rhine", not of the Rheinbund. Rheinbund is the German term for it. - Confederation of the Rhine
I also believe the "Freikorps" one is actually Russian because of the eagle displayed on it, but I'm not sure about this, so no need to change it.
The blue flag with the yellow circle/sphere is the flag of Brazil. - The Kingdom of Brazil
Maybe try and make the namings uniform? List what entity it is before giving the name or remove all the entities.