Error · html-lang-valid
The declared language is invalid
The language code is misspelled, so screen readers ignore it.
Who it leaves out: blind people (screen readers)🔎 also SEO
How to fix it
Use a valid code such as "es" or "en". Code included.
In the code
Use a valid BCP 47 code in <html lang="…">, such as "en", "es" or "pt-BR".
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Related errors
Automated testing covers roughly half of WCAG criteria; a full conformance claim also requires manual review. Technical information, not legal advice.