Do you have a German ancestors? That language fancies itself on long words and when you study them a little that actually make sense :-) Maybe subconsciously she is reaching out to your old family dna.... not sure, shooting from a hip here...
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No, I'm of Chinese ancestry, my wife too. Pretty sure 100% Han Chinese on both sides of the family, unless there was some German mixed in there from way back when by who know who. But I highly doubt it. I think she's just a show off and is learning these words to impress her friends or something along those lines.
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