hreflang="km"

km is a valid hreflang value for Khmer.

Language: Khmer (km, ISO 639-1)

Example

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

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

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