Translate Heading with WPML problem

I’m loving the ease of this plugin but I have one small problem. I’m using it on a multilingual site with the WPML plugin that handles translations. WPML recognizes the strings from plugins and lets me add translations. It recognizes all the plugins strings but it doesn’t recognize the header I input in “Logged out heading” or “Logged in heading”. Any idea if this can be fixed? Perhaps those headers can be

https://ww.wp.xz.cn/plugins/wp-sidebar-login/