Localisation not fully working

Few text chains are not translated (the one in author_category_Panel_class.php file, outside the class definition) because there translation are fired before the actual loading of the textdomain, deferred until all plugins are loaded, based on the action “plugins-loaded).
On my ised, I’ve just changed the line add_action('plugins_loaded', array($this,'load_translation'));
by $this->load_translation();
and it works. I don’t know if it is the right solution.

https://wordpress.org/plugins/author-category/