After updating EasySocial appeared untranslated lines of code
APP_USER_PHOTOS_STREAM_UPDATED_EVENT_COVER_GROUPS
APP_EVENT_PHOTOS_STREAM_UPLOADED_PHOTO_IN_ALBUM_PLURAL_GROUPS
APP_USER_PHOTOS_STREAM_UPDATED_EVENT_COVER_GROUPS
APP_EVENT_PHOTOS_STREAM_UPLOADED_PHOTO_IN_ALBUM_PLURAL_GROUPS