Custom Permalinks - Internal links point to original pages

Overview of the issue

When using Custom Permalinks with WPML, internal links to translated pages may point to the original-language page instead of the translated page when the target page uses a custom permalink.

Workaround

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

Workaround – Part I

• Open the …/wp-content/plugins/custom-permalinks/includes/class-custom-permalinks-frontend.php file.
• Look for line 165.
• Replace:

  	public function wpml_permalink_filter( $permalink, $language_code ) {
  		$custom_permalink   = $permalink;
  
          

• With:

  	public function wpml_permalink_filter( $permalink, $language_code ) {
  		$custom_permalink   = $permalink;
  		$language_code = apply_filters( 'wpml_current_language', NULL ); 
          

Workaround – Part II

• In the same file (class-custom-permalinks-frontend.php).
• Look for line 913.
• Replace:

  	public function custom_page_link( $permalink, $page ) {
  		$custom_permalink = get_post_meta( $page, 'custom_permalink', true );
  		if ( $custom_permalink ) {
  			$language_code = apply_filters(
  				'wpml_element_language_code',
  				null,
  				array(
  					'element_id'   => $page,
  					'element_type' => 'page',
  				)
  			);
  
  			$permalink = $this->wpml_permalink_filter(
  				$custom_permalink,
  				$language_code
  			);
  
          

• With:

  		public function custom_page_link( $permalink, $page ) {
  		$custom_permalink = get_post_meta( $page, 'custom_permalink', true );
  		if ( $custom_permalink ) {
  			$language_code = apply_filters(
  				'wpml_element_language_code',
  				null,
  				array(
  					'element_id'   => $page,
  					'element_type' => 'page',
  				)
  			);
  			$page_translated = apply_filters(
  				'wpml_object_id',
  				$page,
  				'page',
  				$language_code
  			);
  			$custom_translated_permalink = get_post_meta( $page_translated, 'custom_permalink', true );
  			if ( $custom_translated_permalink ) {
  				$custom_permalink = $custom_translated_permalink;
  			}
  			$permalink = $this->wpml_permalink_filter(
  				$custom_permalink,
  				$language_code
  			);