[ WooCommerce ] Single Product - add new/rename product info tab

functions.php

<?php
// single product - add new tab
add_filter( 'woocommerce_product_tabs', 'dejavu_woo_new_tab' );
function dejavu_woo_new_tab( $tabs ) {
  
  // rename default product tabs
	$tabs[ 'description' ][ 'title' ] = '內容簡介';
	$tabs[ 'additional_information' ][ 'title' ] = '其他資訊';
  
  // display only when ACF custom fields is presented
	if( is_singular('product') && get_field('my-field') ) :
		$tabs['other_tabs'] = array(
			'title' 	=> __( '目錄', 'woocommerce' ),
			'priority' 	=> 1,
			'callback' 	=> 'dejavu_woo_new_tab_content'
		);
	endif;
	return $tabs;
}

function dejavu_woo_new_tab_content() {
	echo $variable = get_field('my-field');	
}