In this thread, I want to bring the possibility of Germanization of Austria's non-German Catholic subjects (Czech, Slovak, Slovene, Hungarian, Croat, Italian...). The PoD is 1739, after losing Serbia but before getting Podolia...
An early PoD that leads to at least 51% German speaking population of Austria as their primary language by 1815 (minus Galicia and Lombardy-Venice).
Is this within the reach of possibilities?