Tips on Customizing Falang multilanguage for WordPress

How to Hide Falang multilanguage for WordPress Admin Menus

function plt_hide_falang_menus() {
	//Hide "Falang".
	remove_menu_page('falang-translation');
	//Hide "Falang → Translate Posts".
	remove_submenu_page('falang-translation', 'falang-translation');
	//Hide "Falang → Translate Terms/Taxo".
	remove_submenu_page('falang-translation', 'falang-terms');
	//Hide "Falang → Translate Menus".
	remove_submenu_page('falang-translation', 'falang-menus');
	//Hide "Falang → Translate Strings".
	remove_submenu_page('falang-translation', 'falang-strings');
	//Hide "Falang → Translate Options".
	remove_submenu_page('falang-translation', 'falang-options');
	//Hide "Falang → Languages".
	remove_submenu_page('falang-translation', 'falang-language');
	//Hide "Falang → Settings".
	remove_submenu_page('falang-translation', 'falang-settings');
	//Hide "Falang → Get Help".
	remove_submenu_page('falang-translation', 'falang-help');
}

add_action('admin_menu', 'plt_hide_falang_menus', 11);

Where do I put this code?

How to Hide Falang multilanguage for WordPress Meta Boxes

function plt_hide_falang_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Language switcher" meta box.
	remove_meta_box('falang_lang_switch_box', $screen->id, 'side');
	//Hide the "Languages" meta box.
	remove_meta_box('ml_box', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_falang_metaboxes', 20);