1.8 URL structure & internationalisationMediumInferred
html lang mismatch vs content
What it is
Declared language differs from actual.
Why it matters
Confuses language handling and accessibility.
How to fix it
Set lang to match the content.
Impact
Low-medium. Inferred (a11y + i18n).
Evidence
Declare the correct content language. Google Search Central, Tell Google about localized versions (hreflang); W3C, Web Content Accessibility Guidelines (WCAG) 2.2
Sources