I think you can go to Admin page --> click Posting tabs --> find "Use comma as the only tag separator" line and tick in checkbox. You can create a tag with space behind word. :)
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!