hreflang="ch"

ch is a valid hreflang value for Chamorro.

Language: Chamorro (ch, ISO 639-1)

Example

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

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

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