Language interference is a natural phenomenon occurring in foreign language acquisition. Learners often tend to transfer linguistic patterns from their mother tongue into the target language relying on some apparently similar elements. These intuitive attempts often turn into developmental errors and confusion resulting from differences between language systems and cultures which should be given more consideration. With this purpose in mind, this paper looks into and reveals some aspects of language interference through a glottodidactics analysis of the errors observed during students’ oral and written tasks.