gatsby-config.js

module.exports = {
    ...config,
    plugins: [{
        resolve: 'gatsby-plugin-intl',
        options: {
            path: `${__dirname}/src/intl`,
            languages: ['en', 'pt-br'],
            defaultLanguage: 'en',
            redirect: true,
            redirectComponent: require.resolve('./src/utils/redirect.js'),
        },
    }],
};