In the world of web accessibility, it’s the little things that make a big difference. And when it comes to language attributes, one of the most important little things is to make sure that your HTML lang and XML lang values match. The HTML lang and XML lang attributes are used to specify the language of the content of an element. They’re an important accessibility feature, as they can help users who rely on a screen reader to navigate your site to quickly and easily get to the main content of the page. This guide will explore the importance of matching HTML lang and XML lang values and how to fix it.
Think of your website as a newspaper. You want to make sure that the language is consistent throughout. The same is true for your website. By making sure that your HTML lang and XML lang values match, you can create a more accessible and user-friendly experience for everyone. For a deeper dive into the world of accessibility, see our article on accessibility.

Your Guide to a More Accessible and User-Friendly Website
Fixing mismatched HTML lang and XML lang values is a simple but important task. Here’s how to do it:
- Identify Your Mismatched HTML Lang and XML Lang Values: Use an accessibility testing tool like Creeper to crawl your site and identify any mismatched HTML lang and XML lang values.
- Use the Same Value for Both Attributes: The best way to fix this issue is to simply use the same value for both attributes.
The SEO Power of an Accessible Website
An accessible website is a more successful website. By making your website more accessible, you can improve your user experience, reach a wider audience, and even improve your SEO. For more on the importance of a well-structured website, check out this guide to the lang attribute from MDN.
Don’t let your website be a confusing and frustrating experience for your users. By taking the time to make sure that your HTML lang and XML lang values match, you can build a more accessible and successful online presence. For more on how to create a winning on-page strategy, see our article on on-page SEO.

Frequently Asked Questions
What are the HTML lang and XML lang attributes?
The HTML lang and XML lang attributes are used to specify the language of the content of an element. They’re an important accessibility feature, as they can help users who rely on a screen reader to navigate your site to quickly and easily get to the main content of the page.
Why is it important for my HTML lang and XML lang values to match?
It’s important for your HTML lang and XML lang values to match so that users who rely on a screen reader can easily navigate your site. This is especially important for users with low vision, who may have difficulty finding their place on the page.
How do I make sure that my HTML lang and XML lang values match?
You can make sure that your HTML lang and XML lang values match by simply using the same value for both attributes.
Ready to make your website more accessible? Start your Creeper audit today and see how you can improve your website’s accessibility.