Is this translation in the Public Domain?

[Mohammad Derakhshani <zekr.debian@gmail.com>]

Hi all,

I am involved in the packaging of an Urdu translation of Qur'an for Zekr
<http://packages.debian.org/sid/zekr>.

This Urdu translation is made by Ahmed Rida Khan.
<http://en.wikipedia.org/wiki/Ahmed_Rida_Khan>

Although the author died in 1921, I am not sure if the translation is in
the Public Domain.
I would like to know if this translation is eligible for being merged to
free/non-free repositories of Debian.
Would you please kindly guide me in this issue?

Regards,
Mohammad