For those who have non-HTML pages on your web site, for example PDFs or spreadsheets, you gained’t have the ability to put into practice hreflang during the in the HTML since it doesn’t exist.  Introducing this code to each web page of your site is probably inconvenient and impractical, but https://bookmarkzap.com/story18675804/5-tips-about-prestashop-hreflang-canonical-tags-you-can-use-today