diff --git a/config/services.yaml b/config/services.yaml
index 00165fb..9932121 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -4,7 +4,7 @@
 # Put parameters here that don't need to change on each machine where the app is deployed
 # https://symfony.com/doc/current/best_practices/configuration.html#application-related-configuration
 parameters:
-    allowed_language: "fr|en|nl|pt-PT|pt-BR|de|ar|it|ca|ja"
+    allowed_language: "fr|en|nl|pt-PT|pt-BR|de|ar|it|ca|ja|pl|ru|uk"
     languages: "(%allowed_language%)?"
 services:
     # default configuration for services in *this* file
diff --git a/src/Twig/AppExtension.php b/src/Twig/AppExtension.php
index 0c975b6..b052154 100644
--- a/src/Twig/AppExtension.php
+++ b/src/Twig/AppExtension.php
@@ -66,6 +66,14 @@ class AppExtension extends AbstractExtension
                 return "Català";
             case "ar":
                 return "العربية";
+            case "ja":
+                return "日本語";
+            case "pl":
+                return "Polski";
+            case "ru":
+                return "Русский";
+            case "uk":
+                return "Украïна";
 
         }
     }
diff --git a/templates/nav.html.twig b/templates/nav.html.twig
index d5743b5..8ecb428 100644
--- a/templates/nav.html.twig
+++ b/templates/nav.html.twig
@@ -54,6 +54,9 @@
                         <a class="dropdown-item"  href="{{ path(route, {'_locale':'pt-BR' }) }}">Brasil</a>
                         <a class="dropdown-item"  href="{{ path(route, {'_locale':'ca' }) }}">Català</a>
                         <a class="dropdown-item"  href="{{ path(route, {'_locale':'ja' }) }}">日本語</a>
+                        <a class="dropdown-item"  href="{{ path(route, {'_locale':'pl' }) }}">Polski</a>
+                        <a class="dropdown-item"  href="{{ path(route, {'_locale':'ru' }) }}">Русский</a>
+                        <a class="dropdown-item"  href="{{ path(route, {'_locale':'uk' }) }}">Украïна</a>
                     </div>
                 </li>
             </ul>