Node-如何在path.join中使用变量?

我使用的是一个需要路径连接,其中结束文件的名称是一个变量。

module.exports = function render(locals) {

  const language = locals.path.split('/')[1]
  return Promise.resolve(
    locals.ejsCompile(
      //require(`../i18n-build/index.${language}.js`)
      require(path.join(__dirname, "i18n-build", "index", ${language}.js))
    )
  )
};

我犯了这个错误,我想是因为 ${language}.js 未正确包含在路径中。join

error  Module parse failed: Unexpected token You may need an appropriate
9:35:49 AM:                loader to handle this file type. |     locals.ejsCompile( |
9:35:49 AM:                //require(`../i18n-build/index.${language}.js`) >