Limit the findings in TYPO3
Check the html element of the active fluid layout per site language. A correct hreflang set does not replace the language marking there.
Where to check the setting in TYPO3
Check the language identifier of the site language and the opening html element of the page layout used. In TYPO3 13.4, the appropriate identifier belongs to the respective language context; a separate Fluid or TypoScript override must not remove it. In the delivered HTML, for example, check lang="de" for the German version. hreflang references in the head do not replace this attribute.
Example of this specific finding
Illustrative control case: A German-lang document does not have a lang attribute on the html element. As a result, read-out software does not receive a reliable reference to the main language.
<html lang="de">
<p>Deutschsprachiger Inhalt</p>
<p lang="en">An English quotation.</p>
</html>follow-up audit in TYPO3
Issue the correct document language; mark longer different language passages separately if necessary. Test each language version.
Derogations and scope
long and hreflang perform different tasks. A correct document language does not replace the assignment of language URLs.
Reference: TYPO3 13.4 with EXT:seo. For other major versions and own extensions, responsibilities may differ; check the actually installed output.
Classify the general error
Definition, system-independent causes and further correction examples: Define the main language in the document