✨ Register - invalid phone number error state

ref #1

src/locales/en.json

@@ -18,6 +18,7 @@
     "register_now": "Register now!",
     "registrieren": "Register Now",
     "strasse": "Street/ Block",
+    "this_is_not_a_valid_international_phone_number": "This is not a valid international phone number",
     "view_my_data": "View my data",
     "vorname": "Firstname"
 }