diff --git a/.env b/.env
index 6ad69ce3..87be6efe 100644
--- a/.env
+++ b/.env
@@ -39,4 +39,8 @@ MAILER_URL=null://localhost
 
 FIXER_API_KEY=CHANGEME
 
+# Change this to true, if no url rewriting (like mod_rewrite for Apache) is available
+# In that case all URL contains the index.php front controller in URL
+NO_URL_REWRITE_AVAILABLE=false
+
 ### End custom vars
\ No newline at end of file
diff --git a/assets/ts_src/ajax_ui.ts b/assets/ts_src/ajax_ui.ts
index 8d8d0788..a237f14d 100644
--- a/assets/ts_src/ajax_ui.ts
+++ b/assets/ts_src/ajax_ui.ts
@@ -76,7 +76,11 @@ class AjaxUI {
 
         console.info("AjaxUI started!");
 
-        this.BASE = $("body").data("base-url") + "/";
+        this.BASE = $("body").data("base-url");
+        //If path doesn't end with slash, add it.
+        if(this.BASE[this.BASE.length - 1] !== '/') {
+            this.BASE = this.BASE + '/';
+        }
         console.info("Base path is " + this.BASE);
 
         //Show flash messages
diff --git a/config/services.yaml b/config/services.yaml
index 4c366ec8..589d7aaa 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -53,6 +53,7 @@ services:
     App\Controller\RedirectController:
         arguments:
             $default_locale: '%locale%'
+            $enforce_index_php: '%env(bool:NO_URL_REWRITE_AVAILABLE)%'
 
     App\Command\UpdateExchangeRatesCommand:
         arguments:
diff --git a/src/Controller/RedirectController.php b/src/Controller/RedirectController.php
index ab7a2240..4c3ab6bb 100644
--- a/src/Controller/RedirectController.php
+++ b/src/Controller/RedirectController.php
@@ -42,14 +42,22 @@ class RedirectController extends AbstractController
     protected $default_locale;
     protected $translator;
     protected $session;
+    protected $enforce_index_php;
 
-    public function __construct(string $default_locale, TranslatorInterface $translator, SessionInterface $session)
+    public function __construct(string $default_locale, TranslatorInterface $translator, SessionInterface $session, bool $enforce_index_php)
     {
         $this->default_locale = $default_locale;
         $this->session = $session;
         $this->translator = $translator;
+        $this->enforce_index_php = $enforce_index_php;
     }
 
+    /**
+     * This function is called whenever a route was not matching the localized routes.
+     * The purpose is to redirect the user to the localized version of the page.
+     * @param Request $request
+     * @return \Symfony\Component\HttpFoundation\RedirectResponse
+     */
     public function addLocalePart(Request $request)
     {
         //By default we use the global default locale
@@ -69,6 +77,31 @@ class RedirectController extends AbstractController
 
         //$new_url = str_replace($request->getPathInfo(), '/' . $locale . $request->getPathInfo(), $request->getUri());
         $new_url = $request->getUriForPath('/' . $locale . $request->getPathInfo());
+
+        //If either mod_rewrite is not enabled or the index.php version is enforced, add index.php to the string
+        if (($this->enforce_index_php || !$this->checkIfModRewriteAvailable())
+            && strpos($new_url, 'index.php') === false) {
+            //Like Request::getUriForPath only with index.php
+            $new_url = $request->getSchemeAndHttpHost(). $request->getBaseUrl().'/index.php/' . $locale . $request->getPathInfo();
+        }
         return $this->redirect($new_url);
     }
+
+    /**
+     * Check if mod_rewrite is availabe (URL rewriting is possible).
+     * If this is true, we can redirect to /en, otherwise we have to redirect to index.php/en.
+     * When the PHP is not used via Apache SAPI, we just assume that URL rewriting is available
+     * @return bool
+     */
+    public function checkIfModRewriteAvailable()
+    {
+        if (!function_exists('apache_get_modules')) {
+            //If we can not check for apache modules, we just hope for the best and assume url rewriting is available
+            //If you want to enforce index.php versions of the url, you can override this via ENV vars.
+            return true;
+        }
+
+        //Check if the mod_rewrite module is loaded
+        return in_array('mod_rewrite', apache_get_modules(), false);
+    }
 }
\ No newline at end of file
diff --git a/templates/base.html.twig b/templates/base.html.twig
index 6be546ea..89319e2b 100644
--- a/templates/base.html.twig
+++ b/templates/base.html.twig
@@ -18,7 +18,7 @@
         {{ encore_entry_link_tags('app') }}
     {% endblock %}
 </head>
-<body data-base-url="{{ app.request.basePath }}/{{ app.request.locale }}">
+<body data-base-url="{{ url('homepage', {'_locale': app.request.locale}) }}">
 {% block body %}
 
     <header>