[Resolved] "504 Gateway Time-out" translating category

/**
 * Inserts terms
 *
 * @param (array) $terms the terms to insert key the default term ID and value the translated term name
 * @param (string) $parent the parent term name Null or empty if the terms will not have a parent
 * @param (string) $taxonomy the taxonomy (category | post_tag | custom)
 *
 * @return associative array
 */
function wpml_insert_terms($terms, $parent, $taxonomy){
	$feedback = array();
	// do our terms have a parent?
	if(!empty($parent)){
		$parent_term = term_exists( $parent, $taxonomy );
		if ($parent_term !== 0 && $parent_term !== null) {
			$parent_term_id = $parent_term['term_id'];
		}
	}
	// insert new terms
	foreach($terms as $d_term_id => $t_term_name){
		// with parent
		if(!empty($parent_term_id)){
			$translated_term = wp_insert_term($t_term_name, $taxonomy, array('parent'=> $parent_term_id));
		}
		// without parent
		else{
			$translated_term = wp_insert_term($t_term_name, $taxonomy);
		}	
		// the default term_taxonomy_id (this is what we save in icl_translations)
		$default_term = term_exists( $d_term_id, $taxonomy );			
		//pass the result in the $feddback array for output	
		$feedback[$default_term['term_taxonomy_id']] = $translated_term['term_taxonomy_id'];
	}	
return $feedback;
}
/**
 * Sets language details on newly inserted translated terms
 *
 */
function wpml_set_term_lang_info(){
	global $sitepress;
	
	// set the element type (tax_category | tax_post_tag | tax_custom) and language code
	$element_type ='tax_category';
	$language_code = 'de';
	
	// insert the terms
	// see the wpml_insert_terms function comments for the parameters 
	$terms_to_insert = array(55 => 'DE: Child category', 58 => 'DE: Another child category');
	$inserted_terms = wpml_insert_terms($terms_to_insert, 'DE: A category', 'category');
	
	if(!empty($inserted_terms)){
		global $sitepress;
		// loop
		foreach($inserted_terms as $d_term => $t_term){
			// get the trid from the original
			$trid = $sitepress->get_element_trid($d_term, $element_type);
			
			// associate the translated term to the original			
			$sitepress->set_element_language_details($t_term, $element_type, $trid, $language_code, $sitepress->get_default_language());	
		}
		
		echo "Success!";
	} else {echo "oops! something went wrong!";}
}

//hook on admin_notices
add_action( 'admin_notices','wpml_set_term_lang_info' );

$element_type ='tax_category';
$language_code = 'de';
	
// insert the terms
// see the wpml_insert_terms function comments for the parameters 
$terms_to_insert = array(55 => 'DE: Child category', 58 => 'DE: Another child category');
$inserted_terms = wpml_insert_terms($terms_to_insert, 'DE: A category', 'category');

$element_type ='tax_category';
$language_code = 'de';
     
// insert the terms
// see the wpml_insert_terms function comments for the parameters
$terms_to_insert = array(55 => 'DE: Child category', 58 => 'DE: Another child category');
$inserted_terms = wpml_insert_terms($terms_to_insert, 'DE: A category', 'category');

/**
 * Inserts terms
 *
 * @param (array) $terms the terms to insert key the default term ID and value the translated term name
 * @param (int/string) $parent the parent term name or ID, Null or empty if the terms will not have a parent
 * @param (string) $taxonomy the taxonomy (category | post_tag | custom)
 *
 * @return associative array
 */
function wpml_insert_terms($terms, $parent, $taxonomy){
    $feedback = array();
    // do our terms have a parent?
    if(!empty($parent)){
        $parent_term = term_exists( $parent, $taxonomy );
        if ($parent_term !== 0 && $parent_term !== null) {
            $parent_term_id = $parent_term['term_id'];
        }
    }
    // insert new terms
    foreach($terms as $d_term_id => $t_term_name){
        // with parent
        if(!empty($parent_term_id)){
            $translated_term = wp_insert_term($t_term_name, $taxonomy, array('parent'=> $parent_term_id));
        }
        // without parent
        else{
            $translated_term = wp_insert_term($t_term_name, $taxonomy);
        }  
        // the default term_taxonomy_id (this is what we save in icl_translations)
        $default_term = term_exists( $d_term_id, $taxonomy );          
        //pass the result in the $feddback array for output
        $feedback[$default_term['term_taxonomy_id']] = $translated_term['term_taxonomy_id'];
    }  
return $feedback;
}
/**
 * Sets language details on newly inserted translated terms
 *
 */
function wpml_set_term_lang_info(){
    global $sitepress;
     
    // set the element type (tax_category | tax_post_tag | tax_custom) and language code
    $element_type ='tax_category';
    $language_code = 'de';
     
    // insert the terms
    // multidimmensional array
    $terms_to_insert = array(
		'PARENT CATEGORY ID' => array(
				ID => 'CHILD CATEGORY NAME', 
		),
		'ANOTHER PARENT CATEGORY ID' => array(
				ID => 'CHILD CATEGORY NAME',
				ID => 'CHILD CATEGORY NAME' 				
		),
	);
	
	// note: this will hold a multidimmensional array again.
	$inserted_terms = array();
	// loop
	foreach($terms_to_insert as $parent_cat_ID => $child_cats){
		$inserted_terms[] = wpml_insert_terms($child_cats, $parent_cat_ID, 'category');
	}
    
    if(!empty($inserted_terms)){
        global $sitepress;
        // loop
		foreach($inserted_terms as $k => $v){
			foreach($v as $d_term => $t_term){
				// get the trid from the original
				$trid = $sitepress->get_element_trid($d_term, $element_type);
				 
				// associate the translated term to the original           
				$sitepress->set_element_language_details($t_term, $element_type, $trid, $language_code, $sitepress->get_default_language()); 
			}
		}
         
        echo "Success!";
    } else {echo "oops! something went wrong!";}
}
 
//hook on admin_notices
add_action( 'admin_notices','wpml_set_term_lang_info' );

// multidimmensional array
    $terms_to_insert = array(
		'PARENT CATEGORY ID' => array(
				ID => 'CHILD CATEGORY NAME', 
		),
		'ANOTHER PARENT CATEGORY ID' => array(
				ID => 'CHILD CATEGORY NAME',
				ID => 'CHILD CATEGORY NAME' 				
		),
	);

$wpdb->query("UPDATE wp_icl_translations SET language_code = 'nl' WHERE language_code = ''");