panel/config/locales/en.yml

en:
  errors:
    argument_error: 'Argument `%{argument}` must be an instance of %{class}'
  login:
    email: 'E-mail'
    password: 'Password'
    submit: 'Log in'
  sites:
    title: 'Sites'
  footer:
    powered_by: 'is developed by'
  posts:
    edit: 'Edit'
    save: 'Save'
    date: 'Publication date'
    date_help: 'This changes the articles order!'
    title: 'Title'
    tags: 'Tags'
    tags_help: 'Comma separated!'
    categories: 'Categories'
    categories_help: 'Comma separated!'
    slug: 'Slug'
    slug_help: 'This is the name of the article on the URL, ie. /title/.  You can leave it empty.'
    logger:
      rm: 'Removed %{path}'
    errors:
      path: 'File already exist'
      file: "Couldn't write the file"
      title: 'Post needs a title'
      date: 'Post needs a valid date'