/usr/share/myspell/dicts/th_de_DE_v2.idx is in mythes-de 20120516-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/myspell/dicts/../../mythes/th_de_DE_v2.idx
/usr/share/myspell/dicts/../../mythes/th_de_DE_v2.idx