Translation, a typical form of language-use, exists under constant regulations and restrictions imposed by intentionality and context, which play a vital role in deciding on the development of the translator’s mental activities, the output of verbal representations, and the generation of ST-TT relation. Drawing upon the theory of causal implication, the paper is intended to justify the causality of translation by proposing a mental model to visualize the generation of causality between ST and TT. Within the framework of the model, the paper, taking into account the bidirectional relationship between intentionality and context, illustrates with use cases the particulars that bind the translator’s mental choices and verbal representations during the translation process.