first version of book form

front/src/locales/en.json

@@ -38,5 +38,8 @@
     "read": "Read",
     "startread": "Start reading",
     "wantread": "I want to read it"
+  },
+  "bookform": {
+    "error": "Error when loading book: {error}"
   }
 }

front/src/locales/fr.json

@@ -38,5 +38,8 @@
     "read": "Lu",
     "startread": "Commencer la lecture",
     "wantread": "Je veux le lire"
+  },
+  "bookform": {
+    "error": "Erreur pendant le chargement du livre: {error}"
   }
 }