hreflang="si"

si is a valid hreflang value for Sinhala.

Language: Sinhala (si, ISO 639-1)

Example

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

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

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