For those who have non-HTML pages on your internet site, like PDFs or spreadsheets, you gained’t be able to apply hreflang within the of your HTML because it doesn’t exist.  You should utilize Ahrefs to unravel this concern – just Visit the list of pages that link to your URL https://growthbookmarks.com/story18725645/an-unbiased-view-of-hreflang-canonical