yes Birth certificate is a must for the applicant (you) but im not sure for your US citizen spouse. also the BC should be both in native language and a english translation copy. but if anything is missing dont do a mistake of not showing up or calling uscis to reschedule. just go to your appt with whatever you have coz its in the hand of immigration officer and you may get approved without it. in worst case scenario, they may issue u a RFE or reschedule the interview. meanwhile, try to get a copy of original and translated BC from home country.