doitinpoland.com/wp-content/plugins/wpml-media-translation/templates/media-selector/media-selector-preloader.twig

<div id="wpml-media-selector-preloader" class="hidden">
    <a class="js-wpml-media-selector-toggle wpml-media-selector-toggle {% if hide_selector %}collapsed{% endif %}">{{ strings.has_posts }}</a>
    <div class="wpml-media-selector-wrapper" {% if hide_selector %}style="display: none"{% endif %}>
        <div class="wpml-media-selector-wrapper-inner">
            <div class="wpml-media-selector-placeholder">&nbsp;</div>
            <div class="wpml-media-selector-placeholder">&nbsp;</div>
            <div class="wpml-media-selector-placeholder">&nbsp;</div>
            <p class="explanation-text small"><i>{{  strings.loading }}</i></p>
        </div>
    </div>
</div>