One Thumbnail image is shown for different languages

The post has different images for the languages.
But only default image is shown for all languages.
Compare pages:
https://test.trophyclub.ca/category/related/
https://test.trophyclub.ca/de/category/related/

The code of the page is

					$thumb = get_post_thumbnail_id();
					$img_url = wp_get_attachment_url( $thumb,'full' ); //get full URL to image (use "large" or "medium" if the images too big)
					$image = aq_resize( $img_url, 300, 300, true ); //resize & crop the image

The page I need help with: [log in to see the link]