lean/meta/i18n/en/lean.error.json

{
  "404": {
    "title": "Page not found",
    "page-title": "404 - Page not found",
    "subtitle": "You may have followed an invalid or expired link...",
    "message": "It seems like an error occured on the link you visited / action you tried. A notification was sent to the application's developer.",
    "back": "Return to previous page"
  },
  "500": {
    "title": "An error occured",
    "page-title": "500 - An error occured",
    "subtitle": "L'action que vous avez tenté d'effectué semble avoir échoué.",
    "message": "Un message d'erreur a été envoyé au développeur de cette application.",
    "back": "Revenir à la page précédente"
  }
}