Yes, but please be aware that PCC is only valid for 6 months. So if you think CIC may request it soon, you can get it done early. That's what I did actually.
I don't think it's required(mandatory), it is case by case.
It's a supplementary document could be used to proof: your parents' marriage and the relationship between you with your parents.
Hi, @YULIA-2016
Please kindly put me in the tracker. Thanks.
PGP-2019
Sponsored people: 2
Parents Country of Citizenship: China
Province : ON
Invitation Received Date : April 25, 2019
eCas: June 7 (message: Application Received by CIC: May 2)
We were interviewed in Ottawa. I think they are pretty good. Didn't show any negative attitude because of my father's visitor status.
I'm not sure if you can request an interpreter or not. But I accompanied my father (doing the interpreter work) during the whole process and no one said anything.
As far as I know, you need to use the PA's information to link the account. If you have a chance to look at the Google spreadsheet, the last sheet mentioned some tricks when linking account.