add i18n

front/src/locales/en.json

@@ -0,0 +1,33 @@
+{
+  "home": {
+    "welcomeuser": "Welcome {username} !",
+    "welcome": "Welcome to PersonalLibraryManager. Please login ou sign in to continue."
+  },
+  "navbar": {
+    "home": "Home",
+    "mybooks": "My Books",
+    "addbook": "Add Book",
+    "logout": "Log out",
+    "signup": "Sign up",
+    "login": "Log In"
+  },
+  "addbook": {
+    "title":"Title",
+    "author":"Author",
+    "submit":"Submit"
+  },
+  "signup": {
+    "username":"Username",
+    "password":"Password",
+    "signup":"Sign up"
+  },
+  "login": {
+    "username":"Username",
+    "password":"Password",
+    "login":"Log in"
+  },
+  "bookbrowser": {
+    "error": "Error when loading books: {error}",
+    "loading": "Loading..."
+  }
+}