1. An implantable responsive neurostimulator for treating a language disorder in a patient, comprising: at least one first electrode configured to be implanted in a first region of the patient's brain, the first region being related to the language disorder; at least one second electrode configured to be implanted in a second region of the patient's brain, the second region of the patient's brain for treating the language disorder; at least one third electrode configured to be implanted in a third region of the patient's brain for treating the language disorder, wherein the third region is different from both the first region and the second region; a detection subsystem coupled to the at least one first electrode, and configured to: continuously monitor one or more electrical signals sensed from the first region of the patient's brain during a selected period when the patient is experiencing a stage of sleep; detect in the one or more electrical signals an occurrence of a neurological event that causes a language disorder; and a therapy subsystem coupled to the at least one second electrode, and the at least one third electrode, and configured to, in response to a detection of an occurrence of a neurological event: apply neurostimulation through the at least one second electrode to the second region of the patient's brain; and apply neurostimulation through the at least one third electrode to the third region of the patient's brain.