International SEO

The Content-Language header is an HTTP header that states which language group a response is intended for.

A country code under ISO 3166-1 is a standardized identifier for a country or territory.

hreflang is an attribute that tells search engines which language or regional versions of a page exist.

A hreflang return tag means two pages reference each other through hreflang.

hreflang in an XML sitemap is one of three ways to tell Google about language and country versions of a page.

The HTML lang attribute declares the human language of an element's content.

A language code, in web and SEO use, is a short identifier for a language, usually the two-letter code from ISO 639-1 such as de, en or fr.

x-default is a reserved value of the hreflang attribute.

Geo-targeting means directing content or ads at users in a specific location.

International SEO is the optimization of a website for users in several countries or languages.

Locale-adaptive redirects send visitors to a particular language or country version based on IP address, location or browser language.

A multilingual website offers its content in more than one language.

A multiregional website explicitly targets users in different countries, for example Germany, Austria and Switzerland.

SEO localization adapts a page to a specific market so that it can be found there.