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How to change autocomplete_route_parameters value on change of select option?

How to change autocomplete_route_parameters value on change of select option?

I have a form element and inside autocomplete_route_parameters, I want to change $langcode value when I select any language from select list.

$form['node_items'] = array(             '#type' => 'textfield',             '#autocomplete_route_name' => 'autocomplete_node_search.autocomplete',             '#autocomplete_route_parameters' => array('skip_node_id_string' => $skip_node_id_string, 'langcode' => $langcode),            );

So if I choose language french from select list, $langcode should become = ‘fr’ via ajax.

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How to change autocomplete_route_parameters value on change of select option?

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