Hi, and thank you for your interest!
yast-nis is being translated using Weblate, a web tool designed to ease translating for both developers and translators.
Translation project for yast-nis into Arabic currently contains 93 strings for translation and is 100.0% complete.
If you would like to contribute to translation of yast-nis, you need to register on this server.
Once you have activated your account just proceed to the translation section.