hreflang="lo"

lo is a valid hreflang value for Lao.

Language: Lao (lo, ISO 639-1)

Example

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

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

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