WPML :: unset one language in switcher

function wpml_filter_langs_02( $languages ) {

    if(did_action( 'wp_footer' ) === 0){
        foreach ( $languages as $k => $language ) {
            if($languages[$k]['language_code'] == 'de'){
                unset($languages[$k]);
            }
        }
    }

    //echo "<pre>";print_r($languages);echo "</pre>";

return $languages;
}
add_filter( 'icl_ls_languages', 'wpml_filter_langs_02' );