Hi, and thank you for your interest!
Psi is being translated using Weblate, a web tool designed to ease translating for both developers and translators.
Translation project for Psi into Urdu (Pakistan) currently contains 2213 strings for translation and is 87.6% complete.
If you would like to contribute to translation of Psi, you need to register on this server.
Once you have activated your account just proceed to the translation section.