Spurious taxonomy added by Polylang?

Whoops – something went wrong with the link tags: My site is

3rd try:

4th try. remove spaces from: “test dronietours .com”

P.S. The issues are identical with all the many themes I have tried…

5th try – sorry – “test dot dronietours dot com”

P.P.S Polylang version is latest: 1.8.5

Theme: Twenty Sixteen
Wordpress: 4.5.1
Polylang: 1.8.5

Only 3 plugins active: Polylang, Map List Pro (https://codecanyon.net/item/map-list-pro-google-maps-location-directories/2620196)
and my utility “Map List Pro Utility” which adds 2 custom taxonomies, “Markers:” and “Facilities For:” See my code below.

1) Permalinks settings: Plain: https://test.dronietours.com/?p=123
2) I use a static front page
3) Polylang settings:
URL modifications: The language is set from the code in the URL.
Detect browser language: Active.
Media: Active
Custom post types and Taxonomies:
Custom post types: Map locations: Yes
Custom taxonomies:
Location Categories: Yes
Markers: Yes
Facilities for: Yes
Synchronization: None checked
WPML Compatibility: shows grayed out ‘Activated’
Tools: Remove all Polylang data when using the “Delete” link on the plugins screen. Unchecked

Code of my utility “Map List Pro Utility” which adds 2 custom taxonomies, “Markers:” and “Facilities For:”

<?php
/*
	Plugin Name: Map List Pro Utility
	Description: Adds 2 extra taxonomies, "Markers:" and "Facilities for:", and utilities, to Map List Pro for DronieTours.
	Version: 0.32 of 26 April 2016
	Author: David Nathan
	Text Domain: maplistpro-utility
	Domain Path:
	Filename:    /wp-content/plugins/MapListProUtility/MapListProUtility.php
	Language pot file: "/wp-content/plugins/MapListProUtility/maplistpro-utility.pot"
	Author: David Nathan
	Author URI: DavidNathanCreations.com
	License: Same as Map List Pro
*/

/*
	"Map List Pro Utility" chosen for Plugin Name as it will then appear directly beneath "Map List Pro" in the plugins page.
	PLUGIN DIRECTORY NAME need not match the PLUGIN NAME but MUST match THIS php Filename.
	ie. "/wp-content/plugins/MapListProUtility/MapListProUtility.php" note directory and plugin names match
*/

// == Installation ==

// 1) Upload MapListProUtility.php and readme.txt file to the plugins directory "/wp-content/plugins/MapListProUtility/"
// 2) Activate "Map List Pro Utility" via the WP dashboard.

// Hook into the init action and call create_maplist_taxonomies when it fires
add_action( 'init', 'create_maplist_taxonomies', 10 );

// Create 2 extra taxonomies, "Markers:" and "Facilities for:" for the 'maplist' MapListPro category object type

function create_maplist_taxonomies() {

	// -------------------- Add new hierarchical taxonomy 'Markers:', like MapListPro categories.
	$labels = array(
		'name'              => _x( 'Markers:', 'taxonomy general name', 'maplistpro-utility' ),
		'singular_name'     => _x( 'Marker:', 'taxonomy singular name', 'maplistpro-utility' ),
		'search_items'      => __( 'Search Markers:', 'maplistpro-utility' ),
		'all_items'         => __( 'All Markers:', 'maplistpro-utility' ),
		'parent_item'       => __( 'Parent Marker:', 'maplistpro-utility' ),
		'parent_item_colon' => __( 'Parent Marker:', 'maplistpro-utility' ),
		'edit_item'         => __( 'Edit Marker:', 'maplistpro-utility' ),
		'update_item'       => __( 'Update Marker:', 'maplistpro-utility' ),
		'add_new_item'      => __( 'Add New Marker:', 'maplistpro-utility' ),
		'new_item_name'     => __( 'New Marker: Name', 'maplistpro-utility' ),
		'menu_name'         => __( 'Markers:', 'maplistpro-utility' ),
	);

	$categoryargsMarkers = array(
		'hierarchical'      => true,
		'labels'            => $labels,
		'show_ui'           => true,
		'show_admin_column' => true,
		'query_var'         => true,
		'rewrite'           => array( 'slug' => 'markers' ),
	);
	// Max 32 chars for $taxonomy name
	register_taxonomy( 'maplist_Markers', array( 'maplist' ), $categoryargsMarkers ); 

	// -------------------- Add new hierarchical taxonomy 'Facilities for:', like MapListPro categories.
	$labels = array(
		'name'              => _x( 'Facilities for:', 'taxonomy general name', 'maplistpro-utility' ),
		'singular_name'     => _x( 'Facilities for:', 'taxonomy singular name', 'maplistpro-utility' ),
		'search_items'      => __( 'Search Facilities for:', 'maplistpro-utility' ),
		'all_items'         => __( 'All Facilities for:', 'maplistpro-utility' ),
		'parent_item'       => __( 'Parent Facilities for:', 'maplistpro-utility' ),
		'parent_item_colon' => __( 'Parent Facilities for:', 'maplistpro-utility' ),
		'edit_item'         => __( 'Edit Facilities for:', 'maplistpro-utility' ),
		'update_item'       => __( 'Update Facilities for:', 'maplistpro-utility' ),
		'add_new_item'      => __( 'Add New Facilities for:', 'maplistpro-utility' ),
		'new_item_name'     => __( 'New Facilities for: Name', 'maplistpro-utility' ),
		'menu_name'         => __( 'Facilities for:', 'maplistpro-utility' ),
	);

	$categoryargsFacilitiesFor = array(
		'hierarchical'      => true,
		'labels'            => $labels,
		'show_ui'           => true,
		'show_admin_column' => true,
		'query_var'         => true,
		'rewrite'           => array( 'slug' => 'facilities-for' ),
	);
	// Max 32 chars for $taxonomy name
	register_taxonomy( 'maplist_FacilitiesFor', array( 'maplist' ), $categoryargsFacilitiesFor ); 

}		// close function create_maplist_taxonomies() 

// Create the "maplistpro-utility" Text Domain, and specify that the po and mo language files are in plugin root directory
function my_plugin_load_plugin_textdomain() {
    load_plugin_textdomain( 'maplistpro-utility', false, false );
}
add_action( 'plugins_loaded', 'my_plugin_load_plugin_textdomain' );

?>

Ignore the code of my plugin above.

I have updated the https://test.dronietours.com/ site to have just 2 plugins, Polylang and Map List Pro https://codecanyon.net/item/map-list-pro-google-maps-location-directories/2620196.

The spurious “blank” taxonomy is only present when Polylang is activated.

Problem workaround

The two unwanted taxonomies introduced by Polylang were ‘language’ and ‘post_translations’. I filtered these out and the problem was resolved.

This was the code I used to suppress the unwanted taxonomies:

if('language' == $taxonomytouse->name){ continue ;}
   if('post_translations' == $taxonomytouse->name){ continue ;}