The labels in the popup when you create a new Annotation are not translatable

In the preview tab, the labels on the left frame (hide annotations, ...) are translatable if you include some changes in the Google modules of the nuxeo-platform-annotations-web package and recompile it, but the labels of the new annotations popup aren't.

Maybe the problem is that the HTML of the iframe doesn't have the property '<meta name="gwt:property" content="locale=xx">' in its HEAD section and always use the default locale.