/usr/share/opendict/dictionaries/plain/freedict-fra-nld.dict.dz/file/freedict-fra-nld.index is in dict-freedict-fra-nld 1.3-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/opendict/dictionaries/plain/freedict-fra-nld.dict.dz/file/../../../../../dictd/freedict-fra-nld.index