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