How to add a currency switcher to the WordPress menu?

To add a currency switcher to the WordPress menu:

Install plugin https://wordpress.org/plugins/shortcode-in-menus/
Go to menu page wp-admin/nav-menus.php
Drop shortcode [wpcs] or [wpcs_price] into navigation label textinput with any text you want

p.s. Possible CSS incompatibilities which should be resolved by you or your site developer

Shortcodes, hooks, hints - all for WPCS - WordPress Currency Switcher Professional