What is the HREFLang Element?
May 1, 2018
Does the URL order matter for HREFLang elements?
May 1, 2018

Are HREFLang Statements Case Sensitive?

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No, they are not case sensitive and search engines will accept both. However, the standard syntax does typically show the country/region in upper case for example for the UK it can be hreflang=”en-GB” where the language is in lower case and the country/region in upper case both versions are accepted.