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Google translation: "Confirm multiple people in face recognition. When I have imported a new image into Lightroom, the names I have learned are suggested for all recognized people (with question marks) and I then confirm them all one after the other. Is there an abbreviation for this? Ie can I say "yes" once and confirm them all at the same time?"
You can't confirm multiple faces in Loupe view (showing one photo), but you can confirm many instances of the same person in People view (the menu command View > People). Select one or more faces that have suggested names and click the checkmark: