Rank Math SEO - False String Translation activation notice

Overview of the issue

When using Rank Math SEO v1.0.266 with WPML, you might see an admin notice asking you to activate WPML String Translation even when the plugin is already active.

“Please activate the WPML String Transaltion plugin to convert Rank Math Setting values in different languages.”

Workaround

Please, make sure of having a full site backup of your site before proceeding.

• Open the …/wp-content/plugins/seo-by-rank-math/includes/admin/class-notices.php file.
• Look for line 209.
• Replace:

  	if ( ! function_exists( 'icl_add_string_translation' ) || get_option( 'rank_math_wpml_notice_dismissed' ) ) {
  		return;
  	}
  	$sitepress      = Sitepress::get()->get_var();
  	$setup_complete = $sitepress->get_setting( 'setup_complete', false );
  	if ( ! $setup_complete ) {
  		return;
  	}
          

• With:

  	if ( get_option( 'rank_math_wpml_notice_dismissed' ) ) {
  		return;
  	}
  
  	$WPMLSettings      = (array) get_option( 'icl_sitepress_settings' );
  	$WPMLSetUpComplete = $WPMLSettings['setup_complete'] ?? false;
  
  	if ( ! $WPMLSetUpComplete || function_exists( 'icl_add_string_translation' ) ) {
  		return;
  	}
          

• Deactivate and reactivate RankMath SEO

You can also refer to the support ticket handled by the plugin author.