/usr/lib/aspell/en.dat is in aspell-en 6.0-0-6ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | name en
charset iso8859-1
special ' -*-
soundslike en
affix en
#repl-table en_affix.dat
|