Which additional Ausgleich-style arrangements can you think of? In real life, the Ausgleich was the Austro-Hungarian Compromise in 1867 that created Austria-Hungary and its dual federal system.
Personally, I can think of:
-European France and Algeria if France permanently keeps Algeria
-Hindu India, Pakistan, and Bangladesh in a reformed independent British India, possibly along the lines of the 1946 Cabinet Mission Plan
-Japan and Korea (Taiwan could either be separate or a part of Japan)
-Czechia and Slovakia in a reformed Czechoslovakia
-Serbia and Croatia in a reformed Yugoslavia
-Russia and Ukraine in a reformed non-Communist Russia
-Turkish Anatolia and the Arab lands in a reformed Ottoman Empire
-Wallonia and Flanders in Belgium
What else is there?
Personally, I can think of:
-European France and Algeria if France permanently keeps Algeria
-Hindu India, Pakistan, and Bangladesh in a reformed independent British India, possibly along the lines of the 1946 Cabinet Mission Plan
-Japan and Korea (Taiwan could either be separate or a part of Japan)
-Czechia and Slovakia in a reformed Czechoslovakia
-Serbia and Croatia in a reformed Yugoslavia
-Russia and Ukraine in a reformed non-Communist Russia
-Turkish Anatolia and the Arab lands in a reformed Ottoman Empire
-Wallonia and Flanders in Belgium
What else is there?