To get Swedish subtitles () for the 2016 series The Crown , your best bet is using the built-in settings on Netflix , as the show is a Netflix original. 📺 How to Enable Subtitles on Netflix
If you prefer a physical copy, verify the region and subtitle support before buying. The Crown (2016) Svenska undertexter
If you are watching in a region like Sweden, the option should appear automatically. If it doesn't: To get Swedish subtitles () for the 2016