Speech perception is beyond the auditory domain and a multimodal process, specifically, an auditory-visual one--we process lip and face movements during speech. In this paper, the findings in cross-language studies of auditory-visual speech perception in the past two decades are interpreted to the applied domain of second language (L2) instruction. This issue had previously been presented in terms of general applications of auditory-visual speech perception research to L2 acquisition and instruction. The focus of this paper is shifted towards Turkish as an L2, a language with unique morphophonemic and phonotactical characteristics that call for specifically designed methods of instruction. Further to this, Turkish is a language whose popularity has been growing ever since due to recent migratory movements and economic factors. While the need for the study of Turkish as an L2 is elucidated here form an experimental psychology point of view, the necessity of that scrutiny is highlighted from an applied and instructional stance as well.