Only show submit button in language form if JS is disabled.

biscuit/core/templates/core/language_form.html

@@ -13,5 +13,7 @@
       </option>
     {% endfor %}
   </select>
-  <input type="submit" value="&gt;">
+  <noscript>
+    <input type="submit" value="&gt;">
+  </noscript>
 </form>