Compare a woocommerce product in En / Gr using WPML functions.

product-compare.php

global $post;
define( 'WP_USE_THEMES', false );
/* Template Name: Price comparison */
/* Page needs to be in EN language */
get_header();

?>
<table>
<tr>
<th>Product Name</th>
<th>Original ID</th>
<th>Price In En</th>
<th>Price In Gr</th>
</tr>
<?php
	$prefs = array(
		post_type => "product",
		post_status => "publish",
		post_per_page => -1
	);
	$products = new WP_Query($prefs);
	while ($products->have_posts()): 
		$products->the_post();
		$en_product = get_the_ID();
		$gr_product = apply_filters('wpml_object_id', $en_product, 'product', FALSE, 'el');
		echo "<tr>\n";
		echo "<td>".get_the_title()."</td>\n";
		echo "<td>".$en_product."</td>\n";
		echo "<td>".get_post_meta($en_product,'_price',true)."</td>\n";
		echo "<td>".get_post_meta($gr_product,'_price',true)."</td>\n";
		echo "</tr>";
	endwhile;
	wp_reset_postdata();
?>
</pre>
<?php 
	get_footer();
?>