hreflang="yo"

yo is a valid hreflang value for Yoruba.

Language: Yoruba (yo, ISO 639-1)

Example

<link rel="alternate" hreflang="yo" href="https://example.com/yo/" />

The code is case-insensitive for Google. The conventional spelling is a lowercase language, a title-case script and an uppercase region: yo.

Without a region, the annotation targets every Yoruba speaker regardless of country. Regional versions sit next to the language-only version in one cluster.