https://github.com/polylang/polylang/issues/26#issuecomment-228336177https://github.com/polylang/polylang/issues/26#issuecomment-228336177

shortcode.php

<?php
function sc_menu( $atts, $content = null, $shortcode_tag = '' ) {

	$bgcolors = array(
		'blue'      => array(
			'class' => 'bg-cd-1',
			'label' => __( 'Blue', 'prohelvetia' ),
		),
		'yellow'    => array(
			'class' => 'bg-cd-2',
			'label' => __( 'Yellow', 'prohelvetia' ),
		),
		'lightgrey' => array(
			'class' => 'bg-lightgrey',
			'label' => __( 'Lightgrey', 'prohelvetia' ),
		),
	);

	$a = shortcode_atts( array(
		'the_title'      => '',
		'the_menu_title' => '',
		'bgcolor'        => '',
		'menuposition'   => 'frontpagedepartments',
	), $atts, $shortcode_tag );

	$bgcolor = array_key_exists( $a['bgcolor'], $bgcolors ) ? $this->bgcolors[ $a['bgcolor'] ]['class'] : '';

	ob_start(); ?>

	<section class="section <?php echo esc_attr( $bgcolor ); ?>">
		<div class="wrap">
			<?php if ( ! empty( $a['the_title'] ) ) : ?><h2><?php echo esc_html( $a['the_title'] ); ?></h2><?php endif; ?>
			<div class="col-wrap">
				<div class="col col-6">
					<?php echo wp_kses_post( wpautop( $content ) ); ?>
				</div>
				<div class="col col-6">
					<?php if ( ! empty( $a['the_title'] ) ) : ?>
						<p><strong><?php echo esc_html( $a['the_menu_title'] ); ?></strong></p>
					<?php endif; ?>

					<?php wp_nav_menu( array(
						'menu_class'     => 'no-list inline-list category-tags',
						'container'      => false,
						'theme_location' => $a['menuposition'],
					) ); ?>
				</div>
			</div>
		</div>
	</section>

	<?php wp_reset_postdata();

	return ob_get_clean();

}
add_shortcode( 'ph_menu', 'sc_menu' );

function register_shortcode_ui_sc_menu() {
	shortcode_ui_register_for_shortcode( 'ph_menu',
		array(
			'label'         => esc_html__( 'Menu items as tags', 'prohelvetia' ),
			'listItemImage' => 'dashicons-admin-post',
			'post_type'     => array( 'page' ),
			'inner_content' => array(
				'label' => esc_html__( 'Content', 'text-domain' ),
			),
			'attrs'         => array(
				array(
					'label' => esc_html__( 'Title', 'text-domain' ),
					'attr'  => 'the_title',
					'type'  => 'text',
				),
				array(
					'label' => esc_html__( 'Title above the menu items', 'text-domain' ),
					'attr'  => 'the_menu_title',
					'type'  => 'text',
				),
				array(
					'label'   => esc_html__( 'Menu', 'text-domain' ),
					'attr'    => 'menuposition',
					'type'    => 'select',
					'options' => array(
						'frontpagedepartments' => __( 'Frontpage departments menu', 'text-domain' ),
					),
				),
			),
		)
	);
}
add_action( 'register_shortcode_ui', 'register_shortcode_ui_sc_menu' );