SEMRush is flagging a potential issue that pages on the site do not have a lang attribute (“N pages have no hreflang and lang attributes”). It’s a single language website so I don’t need hreflang alternate, but I think I need lang.
I haven’t found a setting for each page which I can set to a specific language. I am using en-uk, Can you please tell me how I can add a global lang attribute? (possibly in functions.php or header.php) either through a Snippet or by manual editing.