Improve the landing page

frontend/src/locales/eu/common.json

@@ -417,6 +417,16 @@
     "start_free": "Hasi Doan",
     "register": "Erregistratu",
     "language": "Hizkuntza",
-    "open_menu": "Ireki nabigazio menua"
+    "open_menu": "Ireki nabigazio menua",
+    "theme": "Itxura",
+    "skip_to_content": "Joan eduki nagusira",
+    "close_menu": "Itxi menua",
+    "mobile_menu": "Mugikorreko nabigazio menua"
+  },
+  "nav": {
+    "home": "Hasiera",
+    "features": "Ezaugarriak",
+    "about": "Guri buruz",
+    "contact": "Harremanetan jarri"
   }
 }