The present article aims to evaluate the effects of a programme to enhance proficiency in linguistic competence in verbal aptitude, inductive reasoning, academic performance, self-efficiency in linguistic intelligence and linguistic competence. For this aim, a quasi-experimental study was designed with repeated measurements and a control group. A total of 204 participants were taken from second year secondary schoolchildren (51.47% girls) with a mean age of 12.48 years (SD =1.48). The results showed that the programme stimulated a significant improvement in language skills, academic performance, linguistic intelligence self-efficacy, as well as linguistic competence, in the experimental groups.