Fix the polyglot link in the language selector.

user/plugins/m3-p2/m3-p2.php

@@ -198,11 +198,13 @@ class M3P2Plugin extends Plugin
         $pages = $this->grav['pages'];
 
         $that_page_route = "/" . join("/", array_slice($uri->paths(), 1));
+
 //        var_dump($that_page_route);
 
-        $target_page = $pages->find($that_page_route);
+        $target_page = $pages->find($that_page_route, true);
 
         if ( ! $target_page) {
+            var_dump("NOT FOUND");
             return;
         }
 

user/themes/textbook/templates/partials/language-selector.html.twig

@@ -55,7 +55,9 @@
 {% block polyglot_language_selector %}
   {% if uri.paths and not disable_multilingual %}
   <li>
-    <a href="{{ '/polyglot-columns' ~ uri.path }}">
+{# Ideally we'd give the localized slug, but I can't ->find() it afterwards #}
+{#    <a href="{{ '/polyglot-columns' ~ uri.path }}">#}
+    <a href="{{ '/polyglot-columns' ~ page.rawRoute }}">
       {% if language_display.select == 'default' or language_display.select == 'flag' %}
         <img alt="Rosetta" src="/{{ grav.locator.findResource('plugin://m3-p2/flags/xx.png', false) }}" />
       {% endif %}