In data collection process of Turkey Demographic and Health Surveys (TDHSs), only printed questionnaire in Turkish is used. Therefore, on-the-spot translation was performed during the data collection process, rather than using printed questionnaires in Kurdish or Arabic. From the item-level nonresponse perspective, this study examines the quality of birth date data with two different but interrelated angles: (1) impact of the language mismatch between language of interview and mother tongue of women; and (2) impact of on-the-spot translation from Turkish into Kurdish and Arabic. The findings suggest that interviews with language mismatch and interviews conducted with on-the-spot translations, especially translations performed by local interpreters tended to produce high item-level nonresponse when compared with matched interviews. For this reason, an organized interviewer training session for increasing the effectiveness of on-the-spot translation with explanatory documentations and/or printed questionnaires in Kurdish and Arabic may be considered as options to decrease the item-level nonresponse further.