An HTML attribute that tells search engines which language and regional version of a page to serve to users in a given locale, used on sites with multiple language or country versions of the same content. Implemented incorrectly — missing return tags, wrong language codes, or conflicting canonicals — hreflang is one of the more error-prone parts of international technical SEO, and mistakes can cause the wrong version of a page to rank in the wrong country. See the hreflang guide.
Part of the Plain Intelligence glossary. See all terms.