doitinpoland.com/wp-content/plugins/sitepress-multilingual-cms/locale/jed/sitepress-ru_RU-wpml-widgets-language-switcher-ui.json

{
   "domain": "messages",
   "locale_data": {
      "messages": {
         "": {
            "domain": "messages"
         },
         "All": [
            "Все"
         ],
         "Display on language": [
            "Отображать на языке"
         ]
      }
   }
}