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Make sure that a “lang” attribute has been specified in the markup on every web page.
Example:
<html lang="en">
Please see more detailed information on how to comply with this guideline.
Content Presented in a Different Language Than the Default Language
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| Code Block |
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<ul> <li><a href="..." lang="de">Deutsch</a></li> <li><a href="..." lang="it">Italiano</a></li> <li><a href="..." lang="fr">Français</a></li> ... <li><a href="..." lang="zh-hant">繁體中文</a></li> </ul> |