marimbaman on "[Plugin: Polylang] Menus don't switch according to languages"

Thank you for quick reply. Here is the excerpt from header.php :

<?php do_action('et_header_menu'); ?>

					<nav id="main-menu">
						<?php
							$menuClass = 'nav';
							if ( get_option('trim_disable_toptier') == 'on' ) $menuClass .= ' et_disable_top_tier';
							$primaryNav = '';
							if (function_exists('wp_nav_menu')) {
								$primaryNav = wp_nav_menu( array( 'theme_location' => 'primary-menu', 'container' => '', 'fallback_cb' => '', 'menu_class' => $menuClass, 'echo' => false ) );
							}
							if ($primaryNav == '') { ?>
								<ul class="<?php echo esc_attr( $menuClass ); ?>">
									<?php if (get_option('trim_home_link') == 'on') { ?>
										<li <?php if (is_home()) echo('class="current_page_item"') ?>><a href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php esc_html_e('Home','Trim') ?></a></li>
									<?php }; ?>

									<?php show_page_menu($menuClass,false,false); ?>
									<?php show_categories_menu($menuClass,false); ?>
								</ul>
							<?php }
							else echo($primaryNav);
						?>
					</nav>

and from functions.php:

function register_main_menus() {
	register_nav_menus(
		array(
			'primary-menu' => __( 'Primary Menu', 'Trim' )
		)
	);
}
if (function_exists('register_nav_menus')) add_action( 'init', 'register_main_menus' );