What about CM Answers ?

From plugins repository:

CM Answers is a robust question and answer plugin for WordPress, seamlessly integrating a comprehensive Q&A system into your website.

Whether you’re building a dedicated Q&A network akin to StackOverflow or Quora, or simply enhancing an existing page, CM Answers offers extensive features.


Part of this Question Answers Plugin features include multilingual support, voting, moderation, notifications, access control, customizable shortcodes, reCAPTCHA integration

Question Moderation and NotificationAs an administrator, you can moderate questions and answers and receive email notifications. In addition, users can follow specific topics and receive notifications whenever new answers are posted.

From plugins repository Use-Cases

• Forum Plugin – Puts a lightweight and easy to use Discussion Forum on your WordPress site or blog.
• Support Forum – Supports your users while allowing them vote and answer existing threads that you moderate.
• Community – Adds a question answer area to your WordPress site that allows your members to start their own conversations and ask questions.
• Question Answer – Users can answer questions sent in by other users.
• Customer Support – Support for retail customer’s questions.
• StackOverflow – Adds a StackOverflow style forum to your WordPress site.
• Paid Support – Charge users for posting questions and answers.
• Anonymous Posting – Support anonymous posting with aditional addon.

Plugin Basic Features

• Includes a views count.
• Includes an answers count.
• Administrators can moderate questions and answers and can receive email notifications.
• Users can receive notifications when answering a question is pending.
• Forum sorting options in the question answer pages.
• Template can be easily customized according to users requirements.
• We will be happy to add more language files and submit them to our WP community members. Currently we support: Spanish, German, Polish, Russian, French and Czech.

Pro Version Detailed Features List )