hreflang="yi"

yi is a valid hreflang value for Yiddish.

Language: Yiddish (yi, ISO 639-1)

Example

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

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

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