Please help! Thank youu

[JustMeDr]

Hello ! I am helping a friend to immigrate to Canada with his soon to be wife.

1. He is with Bulgarian citizenship and she is with Portuguese/ Brazilian citizenship .
2. She lives in Bulgaria from 2 years with him but she does not have any Bulgarian documents.
3. She has one child living in Brazil(she wants to include her in the application and take her to Canada if they get the documents )
4. They will apply as a family but how will the different citizenship affect the application ?( eg different requirements ,documents should be issued from the country with citizenship etc.

Thank you ! Any information can be useful.