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seo/html-lang · <html lang>

Your project's app.html should set the lang attribute on <html>.

Severity: warning

What it checks

The <html> element in src/app.html should have a non-empty lang attribute. A missing or empty lang attribute is flagged.

Why it matters

The <html lang> attribute tells screen readers how to pronounce the page, browsers whether to offer translation, and other assistive tools how to handle the content. Google has said it does not use lang for ranking.

How to fix

Set <html lang="..."> in src/app.html:

<html lang="en">

Mode differences

Source analysis (the CLI, the dashboard’s static baseline) reads the <html lang> attribute in src/app.html. Rendered analysis (the Vite plugin’s build pass) reads the shipped document’s <html lang>, taken from the first prerendered page carrying one, so a value filled in at render time by a handle is judged there; source analysis sees only the attribute as written in app.html. The dashboard’s live layer does not evaluate this rule; the static baseline’s result stands.

Disabling

If this is intentional, turn the rule off:

export default {
  rules: {
    'seo/html-lang': 'off'
  }
};