URL: /rules/a11y/html-xml-lang-mismatch
---
title: "HTML XML Lang Mismatch"
description: "Checks that lang and xml:lang attributes match on html element"
---
Checks that lang and xml:lang attributes match on html element
| | |
|---|---|
| **Rule ID** | `a11y/html-xml-lang-mismatch` |
| **Category** | [Accessibility](/rules/a11y) |
| **Scope** | Per-page |
| **Severity** | error |
| **Weight** | 6/10 |
## Solution
If both lang and xml:lang are present on the `` element, they must have the same base language. Mismatches can cause screen readers to announce content in the wrong language. Typically, you only need lang for HTML5 documents.
## Enable / Disable
### Disable this rule
```toml squirrel.toml
[rules]
disable = ["a11y/html-xml-lang-mismatch"]
```
### Disable all Accessibility rules
```toml squirrel.toml
[rules]
disable = ["a11y/*"]
```
### Enable only this rule
```toml squirrel.toml
[rules]
enable = ["a11y/html-xml-lang-mismatch"]
disable = ["*"]
```