Hi.
Raise a webform on the following link:
https://www.canada.ca/en/immigratio...ice/police-certificates/how/saudi-arabia.html
You may mention in the webform body that you have been requested a PCC from IRCC for XYZ reason on XYZ dates. That's it.
I filled it out in both languages by hand. The Arabic needs to be filled in as the Canadian Embassy will stamp under the Arabic part and the MOFA will also attest just the Arabic side. Besides the police station would only follow the Arabic text as well.
For the translation, there are many options. I got mine done previously from Saleh al omar translators. They can be reached through email. While this time around, I got it done from Binbaz. You may google them and contact them through whatsapp.
Hope I have helped.