hreflang="su"

su is a valid hreflang value for Sundanese.

Language: Sundanese (su, ISO 639-1)

Example

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

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

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