Migration Hreflang Loss: 31.6% Drop It After Launch

    Of 1,113 top 1M homepages with rendered hreflang the month before a platform switch, 31.6% had none the month after.

    Lost all hreflang after a switch, by number of hreflang tags before
    1 to 2 tags49.5%
    3 to 5 tags33.1%
    6 to 15 tags16%
    16 or more tags19.4%

    Source: PageSpeed Matters. HTTP Archive top 1M crawls, Sept 2024 to Sept 2026, rendered homepages.

    Homepage hreflang only; inner pages and sitemaps were not checked.

    Source: Migration Hreflang Loss: 31.6% Drop It After Launch - PageSpeed Matters