This research investigates the errors made-out by Iraqi Arab and Kurd students of translation department in writing compositions. There are two categories of errors made by EFL students: interlingual and intralingual errors. The first type of errors is resulted from language transfer made by the students' native language ( Corder 1973:59). In contrast, the second type of errors are caused by defective or partial learning of foreign language rather than the transfer of the first language. Accordingly, this study attempts at answering the following questions: Who are more influenced in their mother tongue Arab or Kurd students? Who are more committed intralingual errors Arabic or Kurdish students? What are the most famous generic errors made-out by students in writing their composition? To explain the researcher uses two ways to analyze errors: contrastive analysis and Error Analysis.