exports.onCreateWebpackConfig = ({ stage, actions, getConfig }) => {
  …
  // Get languages from gatsby-plugin-intl plugin options
  // Access the plugin options directly from the Gatsby config
  const gatsbyConfig = require('./gatsby-config');
  const intlPlugin = gatsbyConfig.plugins.find(plugin => 
    typeof plugin === 'object' && plugin.resolve === 'gatsby-plugin-intl'
  );
  const languages = intlPlugin?.options?.languages;

  const regex = new RegExp(languages.map((l) => l.split("-")[0]).join("|"));
  actions.setWebpackConfig({
    plugins: [
      new webpack.ContextReplacementPlugin(
        /@formatjs[/\\]intl-relativetimeformat[/\\]locale-data$/,
        regex
      ),
      new webpack.ContextReplacementPlugin(
        /@formatjs[/\\]intl-pluralrules[/\\]locale-data$/,
        regex
      ),
    ],
  });
};