After Dietrich "hires" Linda to be his nanny, Linda delivers a voice-over explaining the fortunate circumstances she had stumbled in to - including mentioning that Dietrich frequently entertained guests including Himmler and von Stauffenberg. von Stauffenberg is the officer played by Tom Cruise in Valkyrie (2008).
When Margrete ushers Linda into her home, her mother is playing Chopin's "Andante Spianato" and "Grand Polonnaise" on the piano. She is a Nazi sympathizer, so she probably wouldn't play music by a Polish and French composer.
When the interview starts, Linda says she got interested in the war as a result of watching movies. "The movies. Anything set in Germany. It didn't matter if it was the 1st world war or the 2nd." But she was with Ed Leland when Pearl Harbor was attacked. So she was already grown up when the 2nd world war started, so she couldn't have watched movies about WWII when she was a child.