Made it with the translations (google translator), so someone native speaking should really review it.

Author: frne

Resources/translations/CmfRoutingBundle.fr.xliff

@@ -131,6 +131,14 @@
             ]]>
         </target>
       </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_caption">
+        <source>admin.menu_frontend_link_caption</source>
+        <target>Frontend</target>
+      </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_title">
+        <source>admin.menu_frontend_link_title</source>
+        <target>Ouvrir ce front-end lien dans un nouvel onglet</target>
+      </trans-unit>
     </body>
   </file>
 </xliff>

Resources/translations/CmfRoutingBundle.it.xliff

@@ -132,6 +132,14 @@
             ]]>
         </target>
       </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_caption">
+        <source>admin.menu_frontend_link_caption</source>
+        <target>Frontend</target>
+      </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_title">
+        <source>admin.menu_frontend_link_title</source>
+        <target>Aprire il link front-end in una nuova scheda</target>
+      </trans-unit>
     </body>
   </file>
 </xliff>

Resources/translations/CmfRoutingBundle.nl.xliff

@@ -106,6 +106,14 @@
         <source>form.label_add_trailing_slash</source>
         <target>Slash aan het eind toevoegen</target>
       </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_caption">
+        <source>admin.menu_frontend_link_caption</source>
+        <target>Frontend</target>
+      </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_title">
+        <source>admin.menu_frontend_link_title</source>
+        <target>Open de voorkant link in nieuw tabblad</target>
+      </trans-unit>
     </body>
   </file>
 </xliff>

Resources/translations/CmfRoutingBundle.pl.xliff

@@ -106,6 +106,14 @@
         <source>form.label_add_trailing_slash</source>
         <target>Dodaj slash kończący adres</target>
       </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_caption">
+        <source>admin.menu_frontend_link_caption</source>
+        <target>Frontend</target>
+      </trans-unit>
+      <trans-unit id="admin.menu_frontend_link_title">
+        <source>admin.menu_frontend_link_title</source>
+        <target>Otwórz przednią związek końcowy w nowej karcie</target>
+      </trans-unit>
     </body>
   </file>
 </xliff>