“…Figure 3 shows the mapping of the contribution of the existing literature and the scope of future work as follows: (1) Only one of the 28 articles included had the aim of 'lexicon building', which was to be done by applying concepts and perspectives grounded in learning theory, e.g. self-determination theory [46], students' perceived level of control [47], social interaction [48], interest in the material [49], clarity of goals [50], exposure to new concepts [51], intrinsic motivation [52], flow [53], trust [52], emotional and other technological, situational and teacher-related factors [2]. Moreover, lexicons of one language can only be translated into other languages if one has a distinct cultural and colloquial experience of communication.…”