• KCTD13:• encodes the polymerase delta-interacting protein 1 (PDIP1) • regulation of cell cycle during neurogenesis • SEZ6L2: epilepsy and language disorders• MAPK3: 1) a member of the MAP kinase family2) cellular proliferation, differentiation, and cell cycle • NRX1, NRXN3: synaptic transmission and cell-cell interaction • CHD8, EHMT1, MECP2, SOX5, TBF4, SATB2, FOXP1: chromatin modifiers and transcription factors • FMR1 and CEP290: intellectual disability. The gene discussed is SEZ6L2; the disease is language disorder.