marcelaB-4

add_filter( 'wcml_client_currency', 'modify_client_currency', 10, 1 );
    
function modify_client_currency( $current_currency ) {
    if( !is_admin() ){
        global $woocommerce;
    
        $currency = isset( $_GET['currency'] ) ? esc_attr( $_GET['currency'] ) : $current_currency;
        $currency = strtoupper( $currency );
    
        $woocommerce->session->set('client_currency', $currency);
    
        return $currency;
      }
}

website.com/?lang=CODE&currency=CUR

website.com/CODE/?currency=CUR