WPML: Fix Duplicate Hreflang Tags

Paste this into your theme’s functions.php file to prevent from Hreflang tags to appear on the same current language and fix duplicates.

add_filter('wpml_hreflangs', 'wpml_fix_duplicate_hreflangs', 10, 1);
function wpml_fix_duplicate_hreflangs($hreflang_items){
	foreach ($hreflang_items as $key => $item)
	{
		if (substr($key,0,2)==ICL_LANGUAGE_CODE)
		{
			unset($hreflang_items[$key]);
		}
		
	}
	return $hreflang_items;
}