The purpose of this study is to examine the changes in language processing of patients with chronic aphasia after receiving brain stimulation. The brain stimulation we administer is called transcranial direct current stimulation (tDCS). To accomplish this, computerized speech-language treatment will be administered during the application of active or placebo-like tDCS, and performance on speech-language tasks will be measured before and after treatment. There are detailed assessments throughout the study, which will include at least one MRI session and language testing. In addition, there will be multiple neurological exams completed throughout the study. The treatment duration is three weeks for 45 minutes, five days a week. Research personnel are able to administer assessments and treatment at the participant?s home depending on the needs of the participant. Those that are able to participate in this study must meet the following criteria: one-time ischemic stroke in the left hemisphere; between 25 and 80 years of age; aphasia diagnosis (mild-severe); right-handed (before the stroke); and native speaker of English. Those that are unable to participant in the study may meet the following criteria: dementia, alcohol abuse; psychiatric disorder; traumatic brain injury; or have extensive visual acuity or visual-spatial problems.