Identify the default language of the content
Make sure assistive technologies can determine which language the content is in
Assistive technologies such as screen readers can reliably read content out loud to users, but these tools can’t figure out which language the content is in on their own. Providing this information will ensure these tools rely on the appropriate speech synthesis when reading content, therefore avoiding situations where the pronunciation of content is unintelligible.
To do this, simply provide the information about the default language of the document using the LANG attribute in the HTML element. Use the appropriate two-letter code [...]