When we applied last year our letters did not need notarization. Our common-law declaration on the other hand did need notarization. You need the latter for an OWP but not for the PR application alone. It can't hurt to include it though. So if she applies for an OWP then the notarized common law...
Others may weigh in but I do not believe this will cause issues. Do send IRCC a note through the web form to let them know of your wife's dependants correct birthday though. I think a missing middle name on an ID is not an issue as long as first and last name are correct.
I honestly don`t know. It also depends on what type of application they submitted I guess. In general, if you send your documents to a different address than the one indicated in the instructions, then yes, that could be a problem.
I don`t know what the current addresses are, but it should be very clearly indicated to where you have to send your application. I had to send mine to Mississauga last year, I am not sure if that has changed since.
I agree that this should suffice. You can also provide your own translation as well, which should be easy for CIC to verify if they feel the need to. We did not go overboard with our chat logs, we just sent 4 screenshots of conversations throughout our relationship.
For example: https://www.isepstudyabroad.org/ that's what I did many years ago. Awesome program! I am not 100% sure if you can do UK-CAN with this one, but there are similar programs like it out there. The downside is that it is not a quick and easy solution, but I find with immigration it...
Sorry, I can't be of much help in that case but I am sure there is something and others may know better. May also be worth looking into exchange programs for her to come to UK, or vice versa.
I would apply for a post graduate work permit. You have 90 days after graduation from your Master's to apply for one. Note that you have to decide between that or continuing on with a PhD. Can't do both at the same time.
That can be part of it, depending what route you take. I think looking into some basics may be useful: https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada.html