FOXP2 plays a critical role in the neuronal processes that contribute to language and speech performance (Liegeois et al., 2003; Vernes et al., 2007), and its polymorphisms have been reported to be involved in the pathophysiology of cognitive function and language phenotypes in schizophrenia (Tolosa et al., 2010; Mozzi et al., 2017). This evidence concerns the gene FOXP2 and schizophrenia.