Generate hreflang link tags for multi-language sites. Each locale points at its canonical URL; an x-default fallback covers everything else.
Use x-default for the fallback locale Google should serve when nothing else matches. Standard ISO 639-1 codes plus optional ISO 3166-1 alpha-2 region (e.g. en-US).
<link rel="alternate" hreflang="en" href="https://example.com/" /> <link rel="alternate" hreflang="en-GB" href="https://example.com/en-gb/" /> <link rel="alternate" hreflang="x-default" href="https://example.com/" />
Link: <https://example.com/>; rel="alternate"; hreflang="en", <https://example.com/en-gb/>; rel="alternate"; hreflang="en-GB", <https://example.com/>; rel="alternate"; hreflang="x-default"