Thank you!
The same thing didn't work on Slack since there is no dpkg-reconfigure, but Slack has the Norwegian one, so I changed Æ to Ä and the crossed O to Ö. I have attached the result. I think they are correct but no warranty et c..
capsesc switches Caps and Escape for vi.
This is based on
/usr/share/kbd/keymaps/i386/dvorak/no-dvorak.map.gz. (I had to rename them to *.txt to upload them but they really are just text files. Rename to .map and, optionally, gzip them.)