Hello, I'm a new user of Grav, though I'm not new to programming or to flat file CMSs. I created a multilingual site and need to display a language selector. To this end, I installed and activated the LangSwitcher plugin, which requires adding {% include 'partials/langswitcher.hreflang.html.twig' %} to the theme. My site uses the Typhoon theme, which appears to be the current state of the art for Grav.
Can anyone please tell me exactly where this code (which path and file, which line number?) should go to add a language selector to the upper right of the navbar in both desktop and mobile views? I've been trying to add it to different files but Grav keeps returning error messages. Many thanks in advance for any assistance.