URL: /rules/a11y/valid-lang --- title: "Valid Lang Attributes" description: "Checks that all lang attributes on the page have valid values" --- Checks that all lang attributes on the page have valid values | | | |---|---| | **Rule ID** | `a11y/valid-lang` | | **Category** | [Accessibility](/rules/a11y) | | **Scope** | Per-page | | **Severity** | warning | | **Weight** | 5/10 | ## Solution All lang attributes should use valid BCP 47 language tags. This includes lang attributes on any element, not just ``. Use lang to mark up content in a different language from the page default. ## Enable / Disable ### Disable this rule ```toml squirrel.toml [rules] disable = ["a11y/valid-lang"] ``` ### Disable all Accessibility rules ```toml squirrel.toml [rules] disable = ["a11y/*"] ``` ### Enable only this rule ```toml squirrel.toml [rules] enable = ["a11y/valid-lang"] disable = ["*"] ```