/usr/share/myspell/dicts/nb_NO.dic is in myspell-nb 2.0.10-7ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/myspell/dicts/../../hunspell/nb_NO.dic
/usr/share/myspell/dicts/../../hunspell/nb_NO.dic