National Translation Practice (NTP) is essentially cross-linguistic speech acts, thus correlates closely with the theoretical terms from Speech Act Theory (SAT) like intention and intentionality, constitutional rules and regulative rules, brute facts and institutional facts. Nevertheless, these facets are largely underexplored in the study of NTP. In terms of the subject of NTP, collective intentionality could expound how the nation, as an abstract subject, carries out the translation process. With regard to the implementing process, NTP starts with brute facts and regulative rule of the source text for code-switching, and is relatively less competent in grasping the institutional facts and constitutional rules of the target language. This paper thus concludes that National Translation Capacity (NTC) is a capacity of collective intentionality gathering by certain authorized institutions. And NTC can be enhanced by subsuming the predication of the realization degree of NTP, the recovery of institutional rules and the effect examination from the recipients.