Locate this line in your qa-config.php file: https://github.com/q2a/question2answer/blob/7f8e3a71492f3c6d140323e1cf8bf2a8147bd5bc/qa-config-example.php#L163
Then just turn it into:
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.