hreflang="lu"

lu is a valid hreflang value for Luba-Katanga.

Language: Luba-Katanga (lu, ISO 639-1)

Example

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

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

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