HTML lang attribute missing

Opportunity severity, in the Content tab

Why it matters

The lang attribute helps search engines, screen readers and translation tools.

How to fix it

Add lang to the <html> element, for example <html lang="en">.

How Crawlune finds it

Crawlune flags HTML lang attribute missing automatically on every crawl and lists the affected URLs under the Content tab, where you can filter, inspect each page and export the list to CSV. The free version crawls up to 550 URLs with every check enabled.