ok…. i found !
you have to create your taxonomy (“langue” and sub-taxonomies (“francais”,”anglais”…)for me)
Now you need to add some code in includes/views/class-taxonomies.php
/////////1
duplicate the function :
line 335 – 363: property_features_taxonomy()
and change elements you need. (just take a look, how it’s construct and change names by your taxonomy name)
/////////2
add in function get_taxonomies()
$this->NAME_OF_YOUR_TAXONOMY_taxonomy()
/////////3
duplicate few lines in function create_terms()
Take a look, how it’s construct and change names by your taxonomy name.
And voilà !
Now with my shortcode works like a charm