open-consul/ui/packages/consul-ui/app/utils/intl/missing-message.js

// if we can't find the message, take the last part of the identifier and
// ucfirst it so it looks human
export default function missingMessage(key, locales) {
  const last = key
    .split('.')
    .pop()
    .split('-')
    .join(' ');
  return `${last.substr(0, 1).toUpperCase()}${last.substr(1)}`;
}