Like, English is a famously difficult language, and Spanish is supposed to be easier. But babies learn English or any language instinctually.
So do babies learn faster if the native language is easier, or do they acquire language at a constant rate depending on their brain development or whatever?
Afaik until WW2 German still was the lingua franca for academia. What, it became harder after the war? Oh wait, perhaps it’s just fallen out of favor while the US, having not been bombed to rubble and having had an influx of educated immigrants, enjoyed a huge economic boom and resulting political and cultural dominance.