I am including my birth certificate, which was translated by a judicially appointed interpreter. If you are including a translation and an affidavit, I think it should be more than enough. One big thing for me was to have a visible seal affixed. For your, I would assume that they would affix an official embassy stamp, and provided you get an affidavit, good to go.. Just be aware of the following:
PLEASE NOTE, WE DO NOT ACCEPT PASSPORTS AS PROOF OF BIRTH, THEREFORE WE ARE UNABLE TO
ACCEPT DETAILS FROM PASSPORT. WE DO ACCEPT SECONDARY SCHOOL RECORDS THAT CONTAIN THE
FOLLOWING:
1) APPLICANT'S NAME
2) DATE OF BIRTH
3) NAME OF PARENT/PARENTS
IF YOU ARE NOT ABLE TO PROVIDE A BIRTH CERTIFICATE WITH ALL 3 CRITERIA, WE REQUIRE AN
AFFIDAVIT STATING ALL OF THIS INFORMATION OR THAT A BIRTH CERTIFICATE CANNOT BE ATTAINED.
http://www.canadavisa.com/canada-immigration-discussion-board/date-of-birth-certificate-issue-t128076.0.html