```js
// MyComponent.stories.js

import { html } from 'lit-html';

const getCaptionForLocale = (locale) => {
  switch (locale) {
    case 'es':
      return 'Hola!';
    case 'fr':
      return 'Bonjour!';
    case 'kr':
      return '안녕하세요!';
    case 'zh':
      return '你好!';
    default:
      return 'Hello!';
  }
};

export const StoryWithLocale = {
  render: (args, { globals: { locale } }) => {
    const caption = getCaptionForLocale(locale);
    return html`<p>${caption}</p>`;
  },
};
```