Define the language of the page

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How to define the language of the page?

Add a lang attribute to the html element with a valid language code.


For english this would be:

<html lang="en">
    <!-- content -->

Valid language codes are either two-letter or three-letter language codes. You can find the list of valid language codes in the ISO 639-1 code list.

Why is this important?

The use cases for the <html lang> attribute are:

  • Screen readers
  • Translation such as Google Translate
  • Spellchecking
  • Localized date and time input

It is crucial to define a valid lang attribute on the html tag. A screen reader uses the lang attribute to select the corresponding language to speak the text if that language is available.

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