--- a/src/pyams_default_theme/component/gallery/templates/renderer-default.pt	Mon Aug 27 11:09:01 2018 +0200
+++ b/src/pyams_default_theme/component/gallery/templates/renderer-default.pt	Mon Aug 27 11:31:05 2018 +0200
@@ -31,7 +31,7 @@
 												  ${image_url}/++thumb++xs:w768?_=${timestamp} 768w" />
 			<!-- fallback image -->
 			<img style="width: 100%;"
-				 tal:attributes="alt alt; src image_url" />
+				 tal:attributes="alt i18n:image.alt_title; src image_url" />
 		</picture>
 	</tal:loop>
 </div>