[Fix] Fix typo errors (#1703)

[Senario]
Someone is now accessing the home page with a root path `/` ( Such as `https://nodejs.org/`)：

The current is now guiding you to an English page.

Now I guide you to a page where you like according to your local system language from `accept-language`, which looks better and more friendly.

[Notices]
Please run `npm i` to install a 3-rd party `accept-language` before you run or deploy this.

server.js

@@ -36,7 +36,7 @@ const layouts = chokidar.watch(path.join(__dirname, 'layouts'), opts)
 const statics = chokidar.watch(path.join(__dirname, 'static'), opts)
 
 // Redirect mechanism meant as a fix for languages where some pages
-// has not translated yet, therefore redirect to the english equivalent,
+// have not been translated yet, therefore redirect to the english equivalent,
 // which isn't the correct language, but better than a 404-page
 function redirectToEnglishUrl (req, res) {
   return () => {