Hi, Ian! I don't think this one is associated with her portrayal of Eliza. I have never seen the German translation either, but it must be interesting! Of course, Pygmalion hadn't yet become a musical when Tante Poldi starred in it.
My parents took her to see My Fair Lady in the early 60s in NYC. She spoke little English, but it didn't take her long to recognize it as her part!
:-)