问题 I am doing the seo for multi-language, i have English,French,Spanish version web pages. so, for English pages, I have example.com/en, and inside the page content with English page as default. <link rel="alternate" href="http://example.com/sp" hreflang="sp" /> <link rel="alternate" href="http://example.com/fr" hreflang="fr" /> <link rel="alternate" href="http://example.com/en" hreflang="x-default" /> However, in french page, http://example.com/fr, do i have to do this again? such as add the