test: add lang toggle

layouts/partials/sidebar/left.html

@@ -55,7 +55,16 @@
                     </a>
                 </li>
             {{ end }}
-
+            {{- $currentLang := $page.Language.Lang -}}
+            {{- range $page.AllTranslations }}
+                {{- if ne .Language.Lang $currentLang }}
+                    <li class="lang-toggle-icon">
+                        <a href="{{ .Permalink }}" title="Switch to {{ .Language.Lang }}">
+                            {{ partial "helper/icon" (printf "toggle_to_%s" .Language.Lang) }}
+                        </a>
+                    </li>
+                {{- end }}
+            {{- end }}
         </ol>
     {{- end -}}