HTML lang Attribute Checker
Optimize your HTML lang attribute for every page
If your website is multilingual or targets a specific market, the lang attribute on the html tag is a small detail with a huge impact. With this checker you can quickly see whether a given URL declares the correct language code, or if your templates still use a wrong default like en instead of hu or de-AT. Enter the exact page URL you want to audit, run the check and then fix your layout or CMS settings where needed. Use this tool regularly when launching new sections so search engines and assistive technologies always understand your content correctly.
Checks whether the root <html> element defines a valid lang attribute (e.g., "en", "hu", "de-AT").
Checks whether the root <html> element defines a valid lang attribute (e.g., "en", "hu", "de-AT").
What it checks
- Presence of the
langattribute on the root<html>element. - Syntactic validity against a simple BCP47 pattern (e.g.,
en,hu,de-AT).
Why it matters
Correct language declaration improves accessibility, indexing and correct snippet rendering for multilingual sites.
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