Prozentsatz der nach dem Ersten Weltkrieg verlorenen Muttersprachler aus der Vorkriegszeit

I tried mapping how many native speakers each Central Powers country lost after their respective peace treaty.

For Germany the two data points are:

Native German speakers in the German Empire pre WW1, and native German speakers in the Weimar Republic after WW1

For Austria:

Native German speakers in the Austro-Hungarian Empire pre WW1, and native German speakers in the First Austrian Republic after WW1

For Hungary:

Native Hungarian speakers in the Austro-Hungarian Empire pre WW1, and native Hungarian speakers in the Kingdom of Hungary after WW1

For Bulgaria:

Native Bulgarian speakers in Bulgaria pre WW1, and native Bulgarian speakers in Bulgaria after WW1

For Turkey:

Native Turkish speakers in the Ottoman Empire pre WW1, and native Turkish speakers in Turkey after WW1

Sources are from the contemporary surveys and censuses

The number for Hungary was definitely not 28%. Even if you believe the highly inflated numbers from the forced magyarisation period you still don’t get more than 15%.

There was no justice in the „peace“

I don’t think you need to put the percentages both inside the countries and next to the names with the arrows. Just pick one.

Wow I didn’t know there were so many native German speakers in the Austrian Empire after WW1, I guess most of those native speakers must have been from the Sudetenland, an area where Germans had settled and lived for centuries. Even then it’s still surprising that Austria proper only accounted for 50% of all native speakers