Yes, use a custom language file to modify some of the phrases in qa-lang-emails.php, removing the substitution codes (beginning with ^) that include the full text. For example you could remove this from the 'q_answered_body' phrase:
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.
April 20, 2021: Q2A 1.8.6 released!